Given an array of strings, return an object containing a key for every different string in the array, and the value is that string's length.
wordLen(["a", "bb", "a", "bb"]) → { "bb": 2, "a": 1 }
wordLen(["this", "and", "that", "and"]) → { "that": 4, "and": 3, "this": 4 }
wordLen(["code", "code", "code", "bug"]) → { "code": 4, "bug": 3 }
var arr = ["a", "bb", "a", "bb"];
var entries = arr.map(x => [x, x.length]);
console.log(Object.fromEntries(entries));You can loop through the array and store each word length in an object with the word itself being the key
function wordLen(arr){
let words = {};
arr.forEach(word => words[word] = word.length);
return words;
}
Non-ES6
function wordLen(arr){
var words = {};
arr.forEach(function(word){ words[word] = word.length });
return words;
}