Javascript/jQuery: remove all non-numeric values from array

Question

For an array: [\"5\",\"something\",\"\",\"83\",\"text\",\"\"]

How to remove all non-numeric and empty values from an array? Desired output: [\"5\"

Answer 1

Use array.filter() and a callback function that checks if a value is numeric:

var arr2 = arr.filter(function(el) {
    return el.length && el==+el;
//  more comprehensive: return !isNaN(parseFloat(el)) && isFinite(el);
});

array.filter has a polyfill for older browsers like IE8.