python面试题——数组

最新推荐文章于 2024-04-28 03:45:27 发布

Articial_Brain

最新推荐文章于 2024-04-28 03:45:27 发布

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分类专栏： python算法

本文链接：https://blog.youkuaiyun.com/Articial_Brain/article/details/79356866

本文介绍了Python面试中常见的数组题目，包括检查anagram、找寻array pair sum、找出缺失的元素、Sentence Reversal字符串反转以及String compression的压缩方法。核心技巧涉及字典、集合操作及字符串处理。

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1.anagram查看两个数组是不是相同的字符组成

def anagram2(s1,s2):
    
    # Remove spaces and lowercase letters
    s1 = s1.replace(' ','').lower()
    s2 = s2.replace(' ','').lower()
    
    # Edge Case to check if same number of letters
    if len(s1) != len(s2):
        return False
    
    # Create counting dictionary (Note could use DefaultDict from Collections module)
    count = {}
    
    
        
    # Fill dictionary for first string (add counts)
    for letter in s1:
        if letter in count:
            count[letter] += 1
        else:
            count[letter] = 1
            
    # Fill dictionary for second string (subtract counts)
    for letter in s2:
        if letter in count:
            count[letter] -= 1
        else:
            count[letter] = 1
    
    # Check that all counts are 0
    for k in count:
        if count[k] != 0:
            return False

    # Otherwis