demethodizing

demethodize.js

// http://tech.pro/blog/2097/clever-way-to-demethodize-native-js-methods
var demethodize = Function.prototype.bind.bind(Function.prototype.call);

// demethodize lets you generalize functions over nodelists, jquery objects, and strings
var map = demethodize([].map);

map('Hello world', function(c) { return c.toUpperCase(); });

// What's more interesting is you can do this despite strings not having a .prototype.map
[].map.call('Hello world', function(c) { return c.toUppercase(); });