How to call each method in some array with jQuery

Question

I have this code

var fields = [
    'ile_sprzedal', 'ile_zarobil', 'srednia_kwota', 'konwersja', 'punkty'
];
fields.each(function(i, v){
    var sum = sum_ + v;
        sum = 0;
    var it = it_ + v;
        it = 0;
});

and this error: TypeError: Object [object Array] has no method 'each'. And the question is - How to call each method on some array?

what is the purpose of sum and it as you are resetting it as soon after calculating it — Arun P Johny, Apr 08 '14 at 14:17
Yes, forEach is the right one; You still can take a look at http://stackoverflow.com/questions/9329446/for-each-in-an-array-how-to-do-that-in-javascript — Regent, Apr 08 '14 at 14:18
if it's jquery, it would be `$.each(fields, function(i, v) {...` — adeneo, Apr 08 '14 at 14:20

score 3 · Accepted Answer · answered Apr 08 '14 at 14:18

Array does not have a each() method, it has forEach() like - Supported by IE>=9

var fields = [
    'ile_sprzedal', 'ile_zarobil', 'srednia_kwota', 'konwersja', 'punkty'];
fields.forEach(function (v, i) {
    var sum = sum_ + v;
    sum = 0;
    var it = it_ + v;
    it = 0;
});

Or jQuery has a $.each() method - cross browser

var fields = [
    'ile_sprzedal', 'ile_zarobil', 'srednia_kwota', 'konwersja', 'punkty'];
$.each(fields, function (i, v) {
    var sum = sum_ + v;
    sum = 0;
    var it = it_ + v;
    it = 0;
});

Alberto De Caro · Answer 2 · 2014-04-08T15:54:00.213

0

If you are using jQuery:

$.each(fields, function(index, item){
    /* further processing */
});

edited Apr 08 '14 at 15:54

answered Apr 08 '14 at 14:18

Alberto De Caro

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As @A.Wolff points out, you shouldn't use [`$(selector).each()`](http://api.jquery.com/each/) for this; instead [`$.each()`](http://api.jquery.com/jQuery.each/) should be used if you are iterating over an array or object. They have similar names and can easily be confused, but they are not the same. – Useless Code Apr 08 '14 at 14:40

score 0 · Answer 3 · answered Apr 08 '14 at 14:19

Well fields is just a plain array. The $().each() (https://api.jquery.com/each/) call is restricted for jQuery objects. So you need to either wrap fields in a jQuery object ($(fields).each) or just use the $.each call: $.each(fields, function(i, v) (https://api.jquery.com/jQuery.each/).

How to call each method in some array with jQuery

3 Answers3