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.

georg · Accepted Answer · 2015-05-28 10:10:50Z

2

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]);

answered May 28, 2015 at 10:10

georg

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