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Exercise 5

Write a findIntegers function that takes an array argument and returns an array that contains only the integers from the input array. Use the filter method in your function.

Example

let things = [1, 'a', '1', 3, NaN, 3.1415, -4, null, false];
let integers = findIntegers(things);
console.log(integers); // => [1, 3, -4]

You can use Number.isInteger(value) to determine whether a numeric value is an integer. It returns true if the value is an integer, false otherwise.

Solution

function findIntegers(array) {
  return array.filter(function(element) {
    return Number.isInteger(element);
  });
}

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