74个Swift标准库函数

最新推荐文章于 2025-08-21 16:23:35 发布
转载 最新推荐文章于 2025-08-21 16:23:35 发布 · 695 阅读 · 1
文章标签：

#swift #IOS #移动开发

本文译自 Swift Standard Library: Documented and undocumented built-in functions in the Swift standard library – the complete list with all 74 functions。我不是原作者，我只是勤劳的翻译工：）文中作者没有提及他是如何发现这么多未在文档中体现的内置函数的，估计是反编译的结果。我测试了好多个都能用，而且Xcode还会给出语法提示：）

Swift包含了74个内置函数，但在The Swift Programming Langage一书中只介绍了其中的7个，其它的都没有在文档中体现。

这篇文章列举出了所有的内置Swift函数。文中所谓的内置函数是指无需引入任何模块（比如说Fundation等）即可以直接使用的函数。

下面先来看看7个在文档中提到的内置函数：

<span class="c1" style="color: rgb(117, 113, 94); ">//断言，参数如果为`true`则继续，否则抛出异常
// assert mentioned on page 55
</span><span class="nx" style="color: rgb(166, 226, 46); ">assert</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="kc" style="color: rgb(102, 217, 239); ">true</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>

<span class="c1" style="color: rgb(117, 113, 94); ">//计算序列的元素个数
// countElements mentioned on page 79
</span><span class="nx" style="color: rgb(166, 226, 46); ">countElements</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="s2" style="color: rgb(230, 219, 116); ">"foo"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">3</span>

<span class="c1" style="color: rgb(117, 113, 94); ">//返回一个新的序列，其中每个元素是一个元组，第一个值为原来元素所在的位置`index`，第二个为原来序列中的元素
// enumerate mentioned on page 94
</span><span class="k" style="color: rgb(102, 217, 239); ">for</span> <span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="nx" style="color: rgb(166, 226, 46); ">j</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="k" style="color: rgb(102, 217, 239); ">in</span> <span class="nx" style="color: rgb(166, 226, 46); ">enumerate</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="s2" style="color: rgb(230, 219, 116); ">"A"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"B"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span>
    <span class="c1" style="color: rgb(117, 113, 94); ">// "0:A", "1:B" will be printed
</span>    <span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="s2" style="color: rgb(230, 219, 116); ">"\(i):\(j)"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="p" style="color: rgb(248, 248, 242); ">}</span>

<span class="c1" style="color: rgb(117, 113, 94); ">//返回所有参数中的最小值
// min mentioned on page 246
</span><span class="nx" style="color: rgb(166, 226, 46); ">min</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">8</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">3</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span>

<span class="c1" style="color: rgb(117, 113, 94); ">//打印
// print mentioned on page 85
</span><span class="nx" style="color: rgb(166, 226, 46); ">print</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="s2" style="color: rgb(230, 219, 116); ">"Hello "</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>

<span class="c1" style="color: rgb(117, 113, 94); ">//打印（带换行）
// println mentioned on page 4
</span><span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="s2" style="color: rgb(230, 219, 116); ">"World"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>

<span class="c1" style="color: rgb(117, 113, 94); ">//排序
// sort mentioned on page 14
</span><span class="k" style="color: rgb(102, 217, 239); ">for</span> <span class="nx" style="color: rgb(166, 226, 46); ">i</span> <span class="k" style="color: rgb(102, 217, 239); ">in</span> <span class="nx" style="color: rgb(166, 226, 46); ">sort</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="s2" style="color: rgb(230, 219, 116); ">"B"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"A"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span>
    <span class="c1" style="color: rgb(117, 113, 94); ">// "A", "B" will be printed
</span>    <span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="p" style="color: rgb(248, 248, 242); ">}</span>

下面列出一些很实用，但未在文档中体现的内置函数：

  • abs(signedNumber)：返回数字的绝对值
<span class="nx" style="color: rgb(166, 226, 46); ">abs</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="o" style="color: rgb(249, 38, 114); ">-</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span>
<span class="nx" style="color: rgb(166, 226, 46); ">abs</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="o" style="color: rgb(249, 38, 114); ">-</span><span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span>
<span class="nx" style="color: rgb(166, 226, 46); ">abs</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span>
  • contains(sequence, element)：如果某个序列sequence（比如说一个数组）包含指定的元素element，则返回true，否则返回false。
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">contains</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
<span class="nx" style="color: rgb(166, 226, 46); ">contains</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Java"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">false</span>
<span class="nx" style="color: rgb(166, 226, 46); ">contains</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">29</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">85</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">96</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">75</span><span class="p" style="color: rgb(248, 248, 242); ">],</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
  • dropFirst(sequence)：返回一个去掉了首个元素的、新的序列（比如一个新数组）。
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">oldLanguages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="nx" style="color: rgb(166, 226, 46); ">dropFirst</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">oldLanguages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
  • dropLast(sequence)：返回一个去掉了最后一个元素的、新的序列（比如一个新数组）。
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">newLanguages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="nx" style="color: rgb(166, 226, 46); ">dropLast</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">newLanguages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
  • dump(object)：打印出某个对象object的所有信息
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">dump</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="c1" style="color: rgb(117, 113, 94); ">// Prints:
// ▿ 2 elements
//   - [0]: Swift
//   - [1]: Objective-C
</span>
  • equal(sequence1, sequence2)：判断两个序列是否相等
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">oldLanguages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="nx" style="color: rgb(166, 226, 46); ">dropFirst</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">oldLanguages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
  • filter(sequence, includeElementClosure)：对序列sequence中每个元素都执行includeElementClosure闭包，并将所有闭包结果为true的元素合成一个新序列sequence并返回。
<span class="k" style="color: rgb(102, 217, 239); ">for</span> <span class="nx" style="color: rgb(166, 226, 46); ">i</span> <span class="k" style="color: rgb(102, 217, 239); ">in</span> <span class="nx" style="color: rgb(166, 226, 46); ">filter</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">...</span><span class="mi" style="color: rgb(174, 129, 255); ">100</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span> <span class="nx" style="color: rgb(166, 226, 46); ">$0</span> <span class="o" style="color: rgb(249, 38, 114); ">%</span> <span class="mi" style="color: rgb(174, 129, 255); ">10</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">0</span> <span class="p" style="color: rgb(248, 248, 242); ">})</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span>
    <span class="c1" style="color: rgb(117, 113, 94); ">// 10, 20, 30, ...
</span>    <span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
    <span class="nx" style="color: rgb(166, 226, 46); ">assert</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">contains</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">20</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">30</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">40</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">50</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">60</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">70</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">80</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">90</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">100</span><span class="p" style="color: rgb(248, 248, 242); ">],</span> <span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">))</span>
<span class="p" style="color: rgb(248, 248, 242); ">}</span>
  • find(sequence, element)：返回序列sequence中某元素element的位置index。如果序列中不存在此元素，则返回nil。
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">find</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span>
<span class="nx" style="color: rgb(166, 226, 46); ">find</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Java"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="nx" style="color: rgb(166, 226, 46); ">nil</span>
<span class="nx" style="color: rgb(166, 226, 46); ">find</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">29</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">85</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">96</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">75</span><span class="p" style="color: rgb(248, 248, 242); ">],</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span>
  • indices(sequence)：返回序列sequence中所有元素的位置（indices是index的复数）
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">indices</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">29</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">85</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">]),</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="mi" style="color: rgb(174, 129, 255); ">0</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span><span class="p" style="color: rgb(248, 248, 242); ">])</span>
<span class="k" style="color: rgb(102, 217, 239); ">for</span> <span class="nx" style="color: rgb(166, 226, 46); ">i</span> <span class="k" style="color: rgb(102, 217, 239); ">in</span> <span class="nx" style="color: rgb(166, 226, 46); ">indices</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">29</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">85</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">42</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span>
    <span class="c1" style="color: rgb(117, 113, 94); ">// 0, 1, 2
</span>    <span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="p" style="color: rgb(248, 248, 242); ">}</span>
  • join(separator, sequence)：将序列sequence通过分隔符separator连成一个字符串，并返回此字符串。
<span class="nx" style="color: rgb(166, 226, 46); ">join</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="s2" style="color: rgb(230, 219, 116); ">":"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"A"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"B"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"C"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="s2" style="color: rgb(230, 219, 116); ">"A:B:C"</span>
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">join</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="s2" style="color: rgb(230, 219, 116); ">"/"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Swift/Objective-C"</span>
  • map(sequence, transformClosure)：对序列sequence中每个元素都执行includeElementClosure闭包，并将所有闭包的结果合成一个新序列sequence并返回。
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">map</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">...</span><span class="mi" style="color: rgb(174, 129, 255); ">3</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span> <span class="nx" style="color: rgb(166, 226, 46); ">$0</span> <span class="o" style="color: rgb(249, 38, 114); ">*</span> <span class="mi" style="color: rgb(174, 129, 255); ">5</span> <span class="p" style="color: rgb(248, 248, 242); ">}),</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="mi" style="color: rgb(174, 129, 255); ">5</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">15</span><span class="p" style="color: rgb(248, 248, 242); ">])</span>
<span class="k" style="color: rgb(102, 217, 239); ">for</span> <span class="nx" style="color: rgb(166, 226, 46); ">i</span> <span class="k" style="color: rgb(102, 217, 239); ">in</span> <span class="nx" style="color: rgb(166, 226, 46); ">map</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">...</span><span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span> <span class="nx" style="color: rgb(166, 226, 46); ">$0</span> <span class="o" style="color: rgb(249, 38, 114); ">*</span> <span class="mi" style="color: rgb(174, 129, 255); ">10</span> <span class="p" style="color: rgb(248, 248, 242); ">})</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span>
    <span class="c1" style="color: rgb(117, 113, 94); ">// 10, 20, 30, ...
</span>    <span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
    <span class="nx" style="color: rgb(166, 226, 46); ">assert</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">contains</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">20</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">30</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">40</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">50</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">60</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">70</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">80</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">90</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">100</span><span class="p" style="color: rgb(248, 248, 242); ">],</span> <span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">))</span>
<span class="p" style="color: rgb(248, 248, 242); ">}</span>
  • max(comparable1, comparable2, etc.)：返回参数中的最大值。
<span class="nx" style="color: rgb(166, 226, 46); ">max</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">0</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span>
<span class="nx" style="color: rgb(166, 226, 46); ">max</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">8</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">3</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">8</span>
  • maxElement(sequence)：返回序列sequence中的最大值。
<span class="nx" style="color: rgb(166, 226, 46); ">maxElement</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">...</span><span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">10</span>
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">maxElement</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span>
  • minElements(sequence)：返回序列sequence中的最小值。
<span class="nx" style="color: rgb(166, 226, 46); ">minElement</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">...</span><span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span>
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">minElement</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span>
  • reduce(sequence, initial, combineClosure)：给定一个序列sequence，以及一个初始值initial，然后将initial和序列里的第1个元素作为参数传入combineClosure中进行运算，得到的结果保存到initial；然后再将initial和第2个元素传入combineClosure中计算，结果保存到initial；重复计算直到所有sequence中的元素都计算完毕，并返回最终的initial值。
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">reduce</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">""</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span> <span class="nx" style="color: rgb(166, 226, 46); ">$0</span> <span class="o" style="color: rgb(249, 38, 114); ">+</span> <span class="nx" style="color: rgb(166, 226, 46); ">$1</span> <span class="p" style="color: rgb(248, 248, 242); ">})</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="s2" style="color: rgb(230, 219, 116); ">"SwiftObjective-C"</span>
<span class="nx" style="color: rgb(166, 226, 46); ">reduce</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">20</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">5</span><span class="p" style="color: rgb(248, 248, 242); ">],</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span> <span class="nx" style="color: rgb(166, 226, 46); ">$0</span> <span class="o" style="color: rgb(249, 38, 114); ">*</span> <span class="nx" style="color: rgb(166, 226, 46); ">$1</span> <span class="p" style="color: rgb(248, 248, 242); ">})</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="mi" style="color: rgb(174, 129, 255); ">1000</span>
  • reverse(sequence)：返回逆序的序列sequence。
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">reverse</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">3</span><span class="p" style="color: rgb(248, 248, 242); ">]),</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="mi" style="color: rgb(174, 129, 255); ">3</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">])</span>
<span class="k" style="color: rgb(102, 217, 239); ">for</span> <span class="nx" style="color: rgb(166, 226, 46); ">i</span> <span class="k" style="color: rgb(102, 217, 239); ">in</span> <span class="nx" style="color: rgb(166, 226, 46); ">reverse</span><span class="p" style="color: rgb(248, 248, 242); ">([</span><span class="mi" style="color: rgb(174, 129, 255); ">1</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">2</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">3</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="p" style="color: rgb(248, 248, 242); ">{</span>
    <span class="c1" style="color: rgb(117, 113, 94); ">// 3, 2, 1
</span>    <span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">i</span><span class="p" style="color: rgb(248, 248, 242); ">)</span>
<span class="p" style="color: rgb(248, 248, 242); ">}</span>
  • startsWith(sequence1, sequence2)：如果序列sequence1中开头的元素跟序列sequence2中的所有元素都相等，则返回true，否则返回false。
<span class="nx" style="color: rgb(166, 226, 46); ">startsWith</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="s2" style="color: rgb(230, 219, 116); ">"foobar"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"foo"</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
<span class="nx" style="color: rgb(166, 226, 46); ">startsWith</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">..</span><span class="mi" style="color: rgb(174, 129, 255); ">100</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="mi" style="color: rgb(174, 129, 255); ">10</span><span class="p" style="color: rgb(248, 248, 242); ">..</span><span class="mi" style="color: rgb(174, 129, 255); ">15</span><span class="p" style="color: rgb(248, 248, 242); ">)</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>
<span class="kd" style="color: rgb(102, 217, 239); ">var</span> <span class="nx" style="color: rgb(166, 226, 46); ">languages</span> <span class="o" style="color: rgb(249, 38, 114); ">=</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="s2" style="color: rgb(230, 219, 116); ">"Objective-C"</span><span class="p" style="color: rgb(248, 248, 242); ">]</span>
<span class="nx" style="color: rgb(166, 226, 46); ">startsWith</span><span class="p" style="color: rgb(248, 248, 242); ">(</span><span class="nx" style="color: rgb(166, 226, 46); ">languages</span><span class="p" style="color: rgb(248, 248, 242); ">,</span> <span class="p" style="color: rgb(248, 248, 242); ">[</span><span class="s2" style="color: rgb(230, 219, 116); ">"Swift"</span><span class="p" style="color: rgb(248, 248, 242); ">])</span> <span class="o" style="color: rgb(249, 38, 114); ">==</span> <span class="kc" style="color: rgb(102, 217, 239); ">true</span>

上面提到的函数是我认为在Swift编程中会经常用到的函数。下面将列出完整的74个函数列表。

完整74个内置函数：

<span class="nx" style="color: rgb(166, 226, 46); ">abs</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">advance</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">alignof</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">alignofValue</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">assert</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">bridgeFromObjectiveC</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">bridgeFromObjectiveCUnconditional</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">bridgeToObjectiveC</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">bridgeToObjectiveCUnconditional</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">c_malloc_size</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">c_memcpy</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">c_putchar</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">contains</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">count</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">countElements</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">countLeadingZeros</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">debugPrint</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">debugPrintln</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">distance</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">dropFirst</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">dropLast</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">dump</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">encodeBitsAsWords</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">enumerate</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">equal</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">filter</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">find</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">getBridgedObjectiveCType</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">getVaList</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">indices</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">insertionSort</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">isBridgedToObjectiveC</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">isBridgedVerbatimToObjectiveC</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">isUniquelyReferenced</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">join</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">lexicographicalCompare</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">map</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">max</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">maxElement</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">min</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">minElement</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">numericCast</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">partition</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">posix_read</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">posix_write</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">print</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">println</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">quickSort</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">reduce</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">reflect</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">reinterpretCast</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">reverse</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">roundUpToAlignment</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">sizeof</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">sizeofValue</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">sort</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">split</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">startsWith</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">strideof</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">strideofValue</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">swap</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">swift_MagicMirrorData_summaryImpl</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">swift_bufferAllocate</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">swift_keepAlive</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">toString</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">transcode</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">underestimateCount</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">unsafeReflect</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">withExtendedLifetime</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">withObjectAtPlusZero</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">withUnsafePointer</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">withUnsafePointerToObject</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">withUnsafePointers</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
<span class="nx" style="color: rgb(166, 226, 46); ">withVaList</span><span class="p" style="color: rgb(248, 248, 242); ">(...)</span>
Swift：Swift函数与闭包_2024-07-14_21-53-10.Tex
03-07 421
闭包（Closure）是Swift中的一种重要概念，它是一种可以捕获并记住其作用域中变量的值的函数。闭包在Swift中非常灵活，可以作为独立的代码块存在，也可以作为函数的参数或返回值。闭包在Swift中的使用非常广泛，尤其是在函数式编程中，它们可以用来定义回调、异步操作、以及任何需要延迟执行的代码逻辑。闭包是Swift中一个强大的特性，它允许你定义可以捕获并记住其作用域中变量的值的函数。闭包表达式提供了一种简洁的语法来定义闭包，而捕获列表则确保了闭包可以安全地访问和修改其定义时所在作用域中的变量。
C语言库函数陷阱：库函数调用生存指南
5ang的博客
03-03 647
凌晨四点的调试现场突然火花四溅——菜鸟程序员的终端监控工具正在表演"字符消失术"。当遇到EOF时，这场面堪比《终结者》名场面：ASCII码集体叛变，127号之后的字符全都举起了反旗！
【iOS】swift 74个Swift标准库函数
chelongfei的博客
12-04 477
本文译自 Swift Standard Library: Documented and undocumented built-in functions in the Swift standard library – the complete list with all 74 functions。我不是原作者，我只是勤劳的翻译工：）文中作者没有提及他是如何发现这么多未在文档中体现的内置函数的，估
Swift标准库函数
weixin_33862993的博客
08-02 144
2019独角兽企业重金招聘Python工程师标准>>> ...
Swift中常用标准库函数的使用
xingql的专栏
06-08 481
// 取绝对值 abs(-10)var languages = ["Swift", "Objective-C"]// 判断序列中是否包含指定的字符串 contains(languages, "Swift")// 去除序列中的第一个元素 var oldLanguages = dropFirst(languages) equal(oldLanguages, ["Objective-C"])// 去除序列
Swift指针的应用
madaxin的博客
11-15 2170
Swift与指针 由于Swift本身是一门较为现代的语言，支持很多高级特性，所以对于程序员来说，大部分时候不需要用到指针这种更“底层”的特性。而Swift语言的设计者也在尽可能希望开发者能尽量少的使用指针。 但是，“慎用”不代表“不能用”，更不代表“没用”。相反，指针非常有用，在某些场景下还是必不可少的特性。尤其是开发工作和系统底层特性、内存处理、高性能需求息息相关时。 所以，Swift通过在施加某种限制的前提下为开发者暴露了指针的使用接口，本篇文章重点介绍Swift使用指针的相关类型、函数，以及在实践应用
Swift异步编程（Async/Await）底层实现剖析(14)
Android开发领域创作者
06-14 323
在现代应用开发中，CPU密集型计算、网络请求、磁盘I/O等操作会阻塞主线程，导致界面卡顿甚至无响应。异步编程允许程序在执行耗时任务时不阻塞主线程，从而提升应用的响应性和用户体验。早期的异步编程主要通过回调（Closure）、GCD（Grand Central Dispatch）和操作队列（OperationQueue）实现，但这些方式存在回调地狱（Callback Hell）、代码难以维护等问题。
iOS开发系列--Swift进阶
dearbaba_8520的博客
08-07 4056
概述 上一篇文章《iOS开发系列--Swift语言》中对Swift的语法特点以及它和C、ObjC等其他语言的用法区别进行了介绍。当然，这只是Swift的入门基础，但是仅仅了解这些对于使用Swift进行
[Swift]URL编码|CharacterSet字符集
Gamin
06-29 2280
URL编码 import UIKit class SchoolDetailVC: BaseController { var webView: WKWebView! override func viewDidLoad() { super.viewDidLoad() } /// 自定义字符集 private func loadRequsetOne(with openUrl: String) { let charSet =...
iOS混淆工具实战 金融支付类 App 的安全防护与合规落地
2501_91510632的博客
08-21 615
金融支付类iOS应用安全防护需综合运用混淆工具与验证流程。Ipa Guard、Swift Shield等工具可分别针对IPA文件、Swift代码进行混淆，保护支付逻辑与接口；MobSF、Frida等用于检测敏感信息与验证运行时安全。建议采用"源码混淆→成品混淆→安全验证"的闭环流程，重点保护支付逻辑与密钥文件，同时满足PCI DSS等合规要求。外包项目可优先使用Ipa Guard快速加固，而源码可控项目应结合obfuscator-llvm进行深度混淆。
Swift+UIKit项目开发实战
wcsandlili的博客
08-18 853
作为一个Android开发，一直想了解下iOS开发具体的流程，索性基于以前自己写的开眼App写一个iOS版本，具体内容如下：iOS版本OpenEye应用，该项目使用swift语言开发，项目基于SnapKit+Combine+Moya+URLNavigator框架开发和封装，具体内容包含如下：1、项目依赖使用Cocoa Pods+SwiftPageckManager混合以来，主要为了测试两种依赖在项目里面的兼容性2、路由基于URLNavigator封装。
Swift + Xcode 开发环境搭建终极指南
夜雨的博客
08-18 1008
Swift + Xcode 开发环境搭建终极指南
第三章 Leaflet集成高德地图示例
最新发布
苦逼前端分享苦逼经验
08-21 223
摘要：本文介绍了如何在Leaflet中集成高德地图，包括三种常用图层的URL格式解析（标准街道地图、卫星影像地图和实时交通图层）。通过LayerGroup实现图层叠加，并提供了完整的HTML示例代码框架，包含地图初始化、图层控件添加、标记点设置和比例尺显示等功能。技术要点包括使用GCJ-02坐标系、商业应用需申请API密钥等注意事项。
vant ImagePreview 图片预览
amy_jork的博客
08-18 488
【代码】vant ImagePreview 图片预览。
Swift与C++混编深度解决方案：手动桥接 vs SwiftyCPP框架性能终极评测
夜雨的博客
08-19 568
Swift与C++混编深度解决方案：手动桥接 vs SwiftyCPP框架性能终极评测。新项目：直接采用SwiftyCPP架构；性能瓶颈项目：优先迁移核心模块；大型遗留系统：采用混合架构渐进式迁移；超高性能场景：结合Metal/CUDA定制扩展
swift基本语法
夜雨的博客
08-18 606
swift基本语法
K距离间隔重排字符串 (LeetCode 358) — Swift解法 + 可运行Demo
网罗天下方法，方便你我开发！！！
08-20 537
这道题的核心是：把字符串里的字符重新排一下顺序，让相同字符之间至少隔开 k 个位置。如果做不到，就返回空串。看上去像“排座位”，其实是一道标准的“贪心 + 堆 + 冷却队列”题。本文用 Swift 写出一份可直接运行的 Demo，顺便把实现细节和常见坑讲清楚。
Swift 实战：判断点集是否关于某条直线对称（LeetCode 356）
网罗天下方法，方便你我开发！！！
08-18 705
对称性是我们在生活中常常看到的现象：镜子里的自己，湖水中的倒影，建筑物的设计美学……在数学和算法里，“对称”同样有重要的应用。LeetCode 356 提出了这样一个问题：给定一组点，判断它们是否能被一条垂直于 y 轴的直线对称。 这题看似小巧，但却考察了我们对几何直观的理解和对哈希集合的灵活运用。本文将从题目描述出发，用 Swift 编写一个完整的解决方案，并附带一个可运行的 Demo，带你感受代码如何模拟“照镜子”的过程。
Swift标准库函数使用详解与示例
本资源摘要将详细探讨Swift标准库函数的使用，以帮助Swift开发者更好地理解和利用这些函数。" 知识点: 1. Swift标准库概述 Swift标准库是Swift语言的一部分，它包含了各种协议、结构体、类和枚举等，以及一套广泛...
评论
添加红包

请填写红包祝福语或标题

个

红包个数最小为10个

元

红包金额最低5元

当前余额3.43元 前往充值 >
需支付：10.00元
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付元
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明：

1.余额是钱包充值的虚拟货币，按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载，可以购买VIP、付费专栏及课程。

余额充值