javascript - Using Array.every() function to check if all values are defined -

javascript - Using Array.every() function to check if all values are defined -

i trying check if values defined in array of mine. code following

var check = function (item){return item !== undefined;}; array.every(check);

i tried on next arrays:

var array = []; array[5] = 0; //[undefined × 5, 0] array.every(check); //return true although there 5 udefined values there

what doing wrong?

as said above every skips "holes".

if want functionality can add together simple method:

array.prototype.myevery= function (pred) { (var = 0; < this.length; i++) { if (!pred(this[i])) homecoming false; } homecoming true; }

javascript arrays