plain for loop instead of forEach in JavaScript

Question

What's wrong with my code shown below. It doesn't work on IE 8 or lower. How can I change it with plain for loop instead of forEach?

var mainItems = [];
[100305, 1003403, 1003511, 1003360, 1002328].forEach(function(id) {
//mainItems.forEach(function(id) {
    mainItems.push(items.filter(function(elem) {
        return elem.id == id;
    })[0])
})

Come on. Try to search at least a little bit http://stackoverflow.com/questions/52080/how-do-i-build-a-loop-in-javascript — awbergs, Mar 20 '13 at 16:44
Have you looked at any of the basic documentation as far as doing `for` loops in JavaScript? This is a *very* basic question that you're asking. — Vivin Paliath, Mar 20 '13 at 16:45
Hey men, you guys sooooo smart???? I asked that because I had no idea. — user1942626, Mar 22 '13 at 12:04

score 1 · Answer 1 · answered Mar 20 '13 at 16:45

1

you can use simply as

 var mainItems = [];

var items = [100305, 1003403, 1003511, 1003360, 1002328];


for(var i=0;i<items.length;i++)   
  mainItems.push(items[i]);

answered Mar 20 '13 at 16:45

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score 0 · Accepted Answer · answered Mar 20 '13 at 16:46

Array.forEach is part of the ES5 specification, which is not supported in older browsers. If you plan on using ES5 code, you should look at including a shim, which adds support for non-supporting browsers.

As for how to write a for loop, the documentation can help you there.

plain for loop instead of forEach in JavaScript

2 Answers2