Remove Whitespace-only Array Elements

Question

Since using array.splice modifies the array in-place, how can I remove all whitespace-only elements from an array without throwing an error? With PHP we have preg_grep but I

Answer 1

A better way to "remove whitespace-only elements from an array".

var array = ['1', ' ', 'c'];

array = array.filter(function(str) {
    return /\S/.test(str);
});

Explanation:

Array.prototype.filter returns a new array, containing only the elements for which the function returns true (or a truthy value).

/\S/ is a regex that matches a non-whitespace character. /\S/.test(str) returns whether str has a non-whitespace character.