// Leetcode #242

// Language: Javascript

// Problem: https://leetcode.com/problems/valid-anagram/

// Author: Chihung Yu

/**

* @param {string} s

* @param {string} t

* @return {boolean}

*/

var isAnagram = function(s, t) {

if((s === null || t === null) || (s.length !== t.length)){

return false;

}

var hash = {};

for(var i = 0; i < s.length; i++){

hash[s[i]] = hash[s[i]] || 0;

hash[s[i]]++;

}

for(var j = 0; j < t.length; j++){

if(!hash[t[j]]){

return false;

}

hash[t[j]]--;

}

return true;

};