var data = [42, 21, undefined, 50, 40, undefined, 9]; data = data.filter(function( element ) { return element !== undefined; });
let array = [0, 1, null, 2, 3]; function removeNull(array) { return array.filter(x => x !== null) };
var colors=["red","blue",,null,undefined,,"green"]; //remove null and undefined elements from colors var realColors = colors.filter(function (e) {return e != null;}); console.log(realColors);
var array = [0, 1, null, 2, "", 3, undefined, 3,,,,,, 4,, 4,, 5,, 6,,,,]; var filtered = array.filter(function (el) { return el != null; }); console.log(filtered);