Leetcode3---Longest Substring Without Repeating Characters

Given a string, find the length of the longest substring without repeating characters.

Examples:

Given "abcabcbb", the answer is "abc", which the length is 3.

Given "bbbbb", the answer is "b", with the length of 1.

Given "pwwkew", the answer is "wke", with the length of 3. Note that the answer must be a substring, "pwke" is a subsequence and not a substring.

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/**
 * @param {string} s
 * @return {number}
 */

var lengthOfLongestSubstring = function(s) { 8     var len = s.length;
    var max = 0;
    var temp = [];
    
    for(var i=0; i<len; i++) {
        var index = temp.indexOf(s[i]);
        if(index >= 0) {
            if(temp.length > max) {
                // 记录当前的长度
                max = temp.length;                       
            }
            // 截取重复字母以及之前的字母
            temp.splice(0, index+1);    
        }
        
        temp.push(s[i]);
    }
    
    return max > temp.length ? max: temp.length;
};

就简单的拿数组模拟一下思路就OK了。