iterating over a javascript list and process specific objects

Question

I have a collection (list) of objects like below,

books{
 book1[
   isSelected = false;
   /*other properties*/
 ],

 book2[
   isSelected = true;
   /*other properties*/
 ],

  book3[
   isSelected = false;
   /*other properties*/
 ]
}

I want to iterate over this list and print ALL the objects which are having property isSelected as true followed by ALL the objects having property isSelected as false .

Please guide me on this approach.

Answer 1

A simple solution in vanilla JS is to sort the array by the property:

books.sort(function(a, b) {
    return b.isSelected - a.isSelected
})

An underscore way would be groupBy :

r = _.groupBy(books, 'isSelected')
console.log(r[true]);
console.log(r[false]);