Example of currying in JavaScript.

curry.js

'use strict';

/**
 * Curry the function.
 * 
 * @param  {Function} func - The function to curry.
 * @param  {...*}
 * @return {Function}
 */
function curry(func) {
    var slice = Array.prototype.slice;
    var args = slice.call(arguments, 1);

    return function() {
        return func.apply(
            this, args.concat(slice.call(arguments, 0))
        );
    };
}

/**
 * Console log helper.
 * 
 * @param {...*}
 */
function say() {
    var args = Array.prototype.slice.call(arguments, 0);
    console.log(args.join(''));
}

var sayHello = curry(say, 'hello');
sayHello(' world'); // hello world