tiny binary search function with comparators


This is a really tiny, stupid, simple binary search library for Node.JS. We wrote it because existing solutions were bloated and incorrect.

This version is a straight port of the Java version mentioned by Joshua Bloch in his article, Nearly All Binary Searches and Merge Sorts are Broken.

Thanks to Conrad Irwin and Michael Marino for, ironically, pointing out bugs.

var bs = require("binary-search");
bs([1, 2, 3, 4], 3, function(a, b) { return a - b; }); // => 2
bs([1, 2, 4, 5], 3, function(a, b) { return a - b; }); // => -3

Be advised that passing in a comparator function is required. Since you're probably using one for your sort function anyway, this isn't a big deal.

This software is released into the public domain.