3. Longest Substring Without Repeating Characters
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Given a string, find the length of the longest substring without repeating characters.
题目解读:给出一个字符串的最长连续不重复字符串。注意,
dvdf
给出的结果是3!所以基本思想就是:
/** * @param {string} s * @return {number} */var lengthOfLongestSubstring = function(s) { if(s==="")return 0; var temp=s.charAt(0); var longest=temp; for(var i=1;i<s.length;i++){ var j=temp.indexOf(s.charAt(i)); if(j<0)temp+=s.charAt(i); else temp=temp.substring(j+1)+s.charAt(i);//这里很重要,新的temp是从j+1开始的 if(longest.length<temp.length)longest=temp; } return longest.length;};
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