[coding] Find all anagrams in a string

코딩테스트 관련 URL

https://leetcode.com/problems/find-all-anagrams-in-a-string/#/description

# 내가 푼 내용

/**
 * @param {string} s
 * @param {string} p
 * @return {number[]}
 */
var findAnagrams = function(s, p) {
    var res = Array();
    
    if(s.length < p.length){
        return res;
    }
    
    p1 = Array.from(p).sort().join("");
    
    for(var i=0; i<=s.length-p.length; i++){
        var s1 = s.substring(i, p.length + i);
        s1 = Array.from(s1).sort().join("");
        if(s1 == p1){
            res.push(i);
        }
    }
    
    return res;
};

var s = "cbaebabacd";
var p = "abc";
var r = findAnagrams(s, p);

console.log(r);

# 봐도 모르는 넘사벽 정답을 그냥 Javascript로 변경만 한거 ㅋㅋ

/**
 * @param {string} s
 * @param {string} p
 * @return {number[]}
 */
var findAnagrams = function(s, p) {
    var res = Array();
    
    if(s.length < p.length){
        return res;
    }
    
    var hash = new Array(256).fill(0);
    var left = 0;
    var right = 0;
    var count = p.length;
    
    for(var i=0; i<p.length; i++){
	    //hash[p.charCodeAt(i)] = (hash[p.charCodeAt(i)] || 0) + 1;
	    hash[p.charCodeAt(i)]++;
	    console.log("hash["+p.charCodeAt(i)+"] "+hash[p.charCodeAt(i)]);
    }
    
    while(right < s.length){
	    if (hash[s.charCodeAt(right++)]-- >= 1){
		    count--;
	    }
	    
	    if(count == 0){
		    res.push(left);
	    }
	    
	    if(right - left == p.length && hash[s.charCodeAt(left++)]++ >= 0){
		    count++;
	    }
    }
    
    return res;
};

var s = "cbaebabacd";
var p = "abc";
var r = findAnagrams(s, p);

console.log(r);