Javascript sort items excluding some specific items

Question

I am trying to sort some items (sort a map) , I can sort it successfully, but I want to exclude some items based on it's attribute

Right now I am sorting like this based on attribute - price

 return (product.attr('active') !== 'f'
                }).sort(function(pA,pB){
                  return pB.attr('price') - pA.attr('price'); });

I want to skip some items based on attr('product_id') so the listed product_id's wont be sorted based, and will be returned first.

return (product.attr('active') !== 'f'
      }).sort(function(pA,pB){
   return pB.attr('price') - pA.attr('price'); }).except(pA.attr('product_id') == 5677));

Something like above, obviously except function does not exist.

Is there a way to exclude some items from sorting, based on it's attributes like id?

Data

Map
active
:
true
brand_id
:
1
categories
:
Map(2) ["All Products", "Snacks", _cid: ".map232", _computedAttrs: {…}, __bindEvents: {…}, _comparatorBound: false, _bubbleBindings: {…}, …]
channel_id
:
1
created
:
"2017-08-14T19:16:56.148029-07:00"
description
:
"Breakfast"
image
:
"/media/333807.png"
name
:
"Breakfast"
price
:
"1"
product_id
:
5677

Please provide an example of your inputs and your expected result. — Sebastian Simon, Feb 22 '18 at 19:39
It's not clear what you mean by "skip". Do you want to filter them out, i.e. remove them completely from the result, or do you just want to sort these specific items always first? — Bergi, Feb 22 '18 at 20:25

Nina Scholz · Accepted Answer · 2018-02-22T19:49:02.227

3

You can sort the wanted item to front by using a check and return the delta of the check.

var array = [{ product_id: 1, price: 1 }, { product_id: 2, price: 3 }, { product_id: 3, price: 4 }, { product_id: 4, price: 1 }, { product_id: 5, price: 8 }, { product_id: 5677, price: 1 }];

array.sort(function (a, b) {
    return (b.product_id === 5677) - (a.product_id === 5677) || b.price - a.price;
});

console.log(array);

.as-console-wrapper { max-height: 100% !important; top: 0; }

With more than just one id for sorting to top

var array = [{ product_id: 1, price: 1 }, { product_id: 2, price: 3 }, { product_id: 3, price: 4 }, { product_id: 4, price: 1 }, { product_id: 5, price: 8 }, { product_id: 5677, price: 1 }];
    topIds = [5677, 2]

array.sort(function (a, b) {
    return topIds.includes(b.product_id) - topIds.includes(a.product_id) || b.price - a.price;
});

console.log(array);

.as-console-wrapper { max-height: 100% !important; top: 0; }

edited Feb 22 '18 at 19:49

answered Feb 22 '18 at 19:42

Nina Scholz

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How can I make it work for multiple product_id's? I need to exclude more than one `product_id` – Cowgirl Feb 22 '18 at 19:47
do the top items need a special sorting, despite of the standard descending sorting by `price`? – Nina Scholz Feb 22 '18 at 19:52
No, top items do not need a special sorting. Will this work with other stand descending sorting by name, date and other sorting methods? – Cowgirl Feb 22 '18 at 19:54
you could chain the other sorting criteria with logical OR behind the price sorting. – Nina Scholz Feb 22 '18 at 19:57
It excludes those items for sorting, for sure, but it's being returned last, I need to return it first – Cowgirl Feb 22 '18 at 20:33
then just switch `a` and `b`. – Nina Scholz Feb 22 '18 at 20:36
Thank you so much, everything works, except, what is the best way to work this when comparing names `if (nameA < nameB) return -1; if(nameA > nameB) return 1; return 0; });` – Cowgirl Feb 22 '18 at 20:47
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/165682/discussion-between-nina-scholz-and-cowgirl). – Nina Scholz Feb 22 '18 at 20:49

Javascript sort items excluding some specific items

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