deleting array items in javascript with forEach() and splice()

gistfile1.js

// If you want to splice in an iterator like Array's forEach() you can do it like this:
var arr = [4, 5, 6];
arr.forEach(function (item, index, arr) {
    if (item === 5) {
        arr.splice(index, 1);
    }
});

/*
The 'arr' in the lambda is a clone of the original arr, and at the end of the forEach, the original gets its length and all elements set to the clone's length and elements.
*/

// Of course not all browsers Array implement forEach so:
if (!Array.prototype.forEach) {
    // augment the Array prototype with a forEach that conforms
    // to ECMAScript5
    //   iterator - a function with signature (item, index, array)
    //   context - an optional context to call the iterator, 'this'
    //             will be set to it inside of the iterator
    Array.prototype.forEach = function (iterator, context) {
        var arr = (new Array()).concat(this);  // clone this
        var i;
        for(i = 0; i < this.length; i++) {  // iterate over this, but use the clone
            iterator.call(context, arr[i], i, arr);
        }
        this.length = arr.length; // reset this to the clone's items
        for(i = 0; i < this.length; i++) {
            this[i] = arr[i];
        }
    };
}

nice !

nice!

Good!

Cool

thanks!

thx!

thanks!

use Array.filter

thanks! 👍

That reverse for loop is what i'm looking for! , Thanks!

very good, reverse for loop! , Thanks!

Very nice, thanks! By the way, there's an unfortunate "space" between the / and the * on Line 73... the space needs to go away in order for this to work.

Like...

/*
 * Comment...
 */

or

/**
 * Comment...
 */

Awesome. Thank you so much.

Biblical!

Nice Thanks :)

Nice！ Thanks！

need continue after splice in reverse for-loop

My case:

cash_menu.map((i, i_index) => {
    cash_menu[i_index].items = cash_menu[i_index].items.filter(item => {
            console.log(item)
            return item.Price !== 0
        }
    )
})

Very nice, thanks! By the way, there's an unfortunate "space" between the / and the * on Line 73... the space needs to go away in order for this to work.

Nothing like fixing something three years later, right?

need continue after splice in reverse for-loop

only if you are doing other things in the loop that you don't want to happen if you remove the item

thank you !

Thank you!