Sorted-collection NPM

SortedCollection

A high-performance array-like JavaScript collection that maintains the sort order of its elements. To be used in place of a regular array of objects.

In addition to basic Array functions like push, splice, unshift, and forEach, SortedCollection introduces new sort-oriented functions, like: insert.

When a value is insert'ed into the collection, it is automatically spliced to the correct position based on the collection's sortDefinition. The default sortDefinition sorts by id:

[{ property: 'id', direction: 'asc' }]

Installation

npm install sorted-collection --save

Basic

var SortedCollection = require('sorted-collection'),
    sortedCollection = new SortedCollection();

sortedCollection.insert({ id: 3 });
sortedCollection.insert({ id: 1 });
sortedCollection.insert({ id: 2 });

console.log('1st item is id #1:', sortedCollection[0]);
console.log('2nd item is id #2:', sortedCollection[1]);
console.log('3rd item is id #3:', sortedCollection[2]);

Usage

var SortedCollection = require('sorted-collection'),
    sortedCollection = new SortedCollection();

// set sort by "name", then by "id" descending
sortedCollection.sortDefinition = [{ property: 'name', direction: 'asc' }, { property: 'id', direction: 'desc' }];

// insert objects
sortedCollection.insert({ id: 1, name: 'Z' });
sortedCollection.insert({ id: 2, name: 'B' });
sortedCollection.insert({ id: 3, name: 'K' });
sortedCollection.insert({ id: 4, name: 'Z' });

// the order of items is properly sorted
console.log('1st item is id #2:', sortedCollection[0]);
console.log('2nd item is id #3:', sortedCollection[1]);
console.log('3rd item is id #4:', sortedCollection[2]);
console.log('4rd item is id #1:', sortedCollection[3]);