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14. 最长公共前缀 #7

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webVueBlog opened this issue Sep 9, 2022 · 0 comments
Open

14. 最长公共前缀 #7

webVueBlog opened this issue Sep 9, 2022 · 0 comments

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@webVueBlog
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14. 最长公共前缀

Description

Difficulty: 简单

Related Topics: 字符串

编写一个函数来查找字符串数组中的最长公共前缀。

如果不存在公共前缀,返回空字符串 ""

示例 1:

输入:strs = ["flower","flow","flight"]
输出:"fl"

示例 2:

输入:strs = ["dog","racecar","car"]
输出:""
解释:输入不存在公共前缀。

提示:

  • 1 <= strs.length <= 200
  • 0 <= strs[i].length <= 200
  • strs[i] 仅由小写英文字母组成

Solution

Language: JavaScript

/**
 * @param {string[]} strs
 * @return {string}
 */
var longestCommonPrefix = function(strs) {
    let re = strs[0] || ''
    if (strs.length === 1) return strs[0]

    for (let i = 1; i < strs.length; i++) {
        while (strs[i].slice(0, re.length) !== re) {
            re = re.slice(0, re.length - 1)
        }
    }

    return re
};
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