Node-collection is a project mainly written in JavaScript, it's free.
An utility for representing and manipulating collections.
Collection is a utility for representing and manipulating collections for nodejs.
var TreeMap = require('src/collection').TreeMap;
// define compare function
function compareFunc(k1, k2) {
return k1 - k2;
}
var treemap = new TreeMap(compareFunc);
treemap.put(1101, {value: "This is a test blob."});
console.log(treemap.get(1101));
var submap = treemap.tailMap(1000, false);
console.log(submap.get(1101));