<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[rock4的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/rock4</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; rock4]]></copyright><item><title><![CDATA[indexof用途]]></title><link>https://blog.youkuaiyun.com/rock4/article/details/119268657</link><guid>https://blog.youkuaiyun.com/rock4/article/details/119268657</guid><author>rock4</author><pubDate>Sat, 31 Jul 2021 08:36:52 +0800</pubDate><description><![CDATA[1：算法：在新数组中查找，看有没有旧数组中的元素，如果有就不添加了，没有就添加
2：代码：
function uniq(arr) {
    var newArr = [];
    for (var i = 0; i &lt; arr.length; i++) {
        if (newArr.indexOf(arr[i]) == -1) { //indexof()==-1  代表没找到该元素
            newArr.push(arr[i]);
        }
    }
   ]]></description><category></category></item><item><title><![CDATA[文字溢出省略号显示]]></title><link>https://blog.youkuaiyun.com/rock4/article/details/107176104</link><guid>https://blog.youkuaiyun.com/rock4/article/details/107176104</guid><author>rock4</author><pubDate>Tue, 07 Jul 2020 10:40:32 +0800</pubDate><description><![CDATA[1：文字溢出部分省略号显示
&lt;style&gt;
	.a{
		width: 50px;
		white-space: nowrap;		//不换行
		overflow: hidden;			//溢出隐藏
		text-overflow: ellipsis;	//溢出省略号
	}
		&lt;/style&gt;
	&lt;/head&gt;
	&lt;body&gt;
	
	&lt;div class="a"&gt;
		a啊啊啊啊啊啊啊啊啊啊啊啊啊111111111111111111
	&lt;]]></description><category></category></item><item><title><![CDATA[常见将盒子居中]]></title><link>https://blog.youkuaiyun.com/rock4/article/details/107163223</link><guid>https://blog.youkuaiyun.com/rock4/article/details/107163223</guid><author>rock4</author><pubDate>Mon, 06 Jul 2020 17:18:47 +0800</pubDate><description><![CDATA[1：父类相对定位，子级绝对定位
		&lt;style&gt;
	.a{
		width: 100px;
		height: 100px;
		position: relative;
		border: 5px solid red;
	}
	.b{
		position: absolute;
		width: 50px;
		height: 50px;
		margin: auto;
		top: 0;
		bottom: 0;
		left: 0;
		right: 0;
		background-col]]></description><category></category></item><item><title><![CDATA[清除浮动]]></title><link>https://blog.youkuaiyun.com/rock4/article/details/107156964</link><guid>https://blog.youkuaiyun.com/rock4/article/details/107156964</guid><author>rock4</author><pubDate>Mon, 06 Jul 2020 14:08:33 +0800</pubDate><description><![CDATA[1：为什么用清除浮动：元素浮动后父级的高变为0，清除浮动是为了避免高度为0
2：方法：
1：直接给父级设置高度
&lt;body&gt;
	&lt;div class="a"&gt;
	&lt;div class="b"&gt;&lt;/div&gt;
	&lt;div class="c"&gt;&lt;/div&gt;
	&lt;/div&gt;
&lt;/body&gt;

&lt;style&gt;
.a{
				
				border: 2px solid red;
				height:100p]]></description><category></category></item><item><title><![CDATA[常见算法  易懂教程]]></title><link>https://blog.youkuaiyun.com/rock4/article/details/104998716</link><guid>https://blog.youkuaiyun.com/rock4/article/details/104998716</guid><author>rock4</author><pubDate>Thu, 02 Jul 2020 14:14:05 +0800</pubDate><description><![CDATA[1：冒泡排序：
就像水中的气泡，从下到上一次增大。将一个数组有序排列，
重要思想：他是两个相邻的数依次比较
	var a=[1,3,5,4,6,2];
			for(var i=0;i&lt;a.length-1;i++){			//后面减去已经排好了的数比较
				for(var j=0;j&lt;a.length-1-i;j++){		
					if(a[j]&gt;a[j+1]){			...]]></description><category></category></item></channel></rss>