unscrambler-part6.js

function unscramble(word) {
    //import dictionary
    const dict = require('an-array-of-english-words');
    //return the result of our logic
    return(
        dict.filter( item => {
            //handle reoccurrences
            const reOccurrence1 = {}
            const reOccurrence2 = {}
            //check if their lengths are equal
            if(item.length === word.length){
                //convert the current item to array and loop through
                item.split('').forEach(letter => {
                    //store the number of reoccurrences of each letter
                    reOccurrence1[letter] = reOccurrence1[letter] + 1 || 1;
                })
                //convert word to array and loop through
                word.split('').forEach(letter => {
                    //store the number of reoccurrences of each letter
                    reOccurrence2[letter] = reOccurrence2[letter] + 1 || 1;
                })
                //counter to increase on every match found
                let match = 0;
                for(let key in reOccurrence1){
                    if(reOccurrence1[key] === reOccurrence2[key]){
                        match++;
                    }
                }
                //return item
                return ( (Object.keys(reOccurrence1).length === match) ? item : false );
            }
            return;
        })
    );
}