Tell us what’s happening:
I am getting undefined values for all the elements in the new array produced by the MAP function, and I don’t know why. Thanks.
Your code so far
const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34];
const squareList = (arr) => {
"use strict";
// change code below this line
const squaredIntegers = arr.map(e => {if(e>0 && Number.isInteger(e)){Math.pow(e,2)}});
// change code above this line
return squaredIntegers;
};
// test your code
const squaredIntegers = squareList(realNumberArray);
console.log(squaredIntegers);
OUTPUT:
[ undefined,
undefined,
undefined,
undefined,
undefined,
undefined,
undefined ]
Your browser information:
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
.
Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6/write-higher-order-arrow-functions