Javascript insert array with null value into string

Question

Is there a way to display the null element when concatenated to a string?

var arr = [];
arr.push('x');
arr.push(null);
arr.push('z');

// arr = ['x', null, 'z']

var samp = 'Array elements are: ' + arr;

// Array elements are: 'x',,'z'

Output that I want:

Array elements are: 'x', null,'z'

Answer 1

You can apply String to the arguments using Array.map. It's very succinct:

arr.map(String)

var arr = [];
arr.push('x');
arr.push(null);
arr.push('z');

var samp = 'Array elements are: ' + arr.map(String);
console.log(samp);