14\. 最长公共前缀
# 14. 最长公共前缀 (opens new window)
# Description
Difficulty: 简单
Related Topics: 字符串 (opens new window)
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"
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示例 2:
输入:strs = ["dog","racecar","car"]
输出:""
解释:输入不存在公共前缀。
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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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