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

You removed an item from the array which reduced the array's length. Your loop continued, skipped some indexes (those which were down-shifted into the removed index), and eventually attempted to access an index outside of the new range.

Try this instead:

var src = ["1"," ","2","3"];
var i = src.length;    
while(i--) !/\S/.test(src[i]) && src.splice(i, 1);
console.log(src);