anagram.js

//one string is an anagram of other strings, if it uses the same character in same quantity not 
//considering spaces or special character


//let word = "resadsdasd%%%!!!!!";
//console.log(word.replace(/[^\w]/g, ""));   // it remove all special characters and space

console.log(anagram('rail safety', 'fairy tales')) // True

function anagram(stringA, stringB) {
    const aCharMap = buildMap(stringA);
    const bChatMap = buildMap(stringB);
    if (Object.keys(aCharMap).length !== Object.keys(bChatMap).length)
        return false;

    for (let char in aCharMap) {
        if (aCharMap[char] !== bChatMap[char])
            return false;
    }

    return true;
}

function buildMap(str) {
    const charMap = {};
    for (let char of str.replace(/[^\w]/g, "").toLowerCase()) {
        charMap[char] = charMap[char] + 1 || 1;
    }
    return charMap;
}