Short explanation of currying and its uses. And maybe pitfalls.

currying.js

/**
This creates a factory with the objective to make less code for repetitive tasks.
Normal way would have been to code each of these functions individually.
Instead we createa  currying function that acts as a factory.
**/

function UnitConversion() {
	// Takes single object.
	var args = Array.prototype.slice.call(arguments);
	if(args[0].length > 0) {
		// Handle if input is an array of objects.
		args = Array.prototype.slice.call(arguments[0]);
	}
	for(var x in args) {
		UnitConversion.prototype[args[x].name] = UnitConversion.prototype.converter(args[x].unit,args[x].factor);	
	}
}
// Creating universal converter.
UnitConversion.prototype.converter = function(toUnit,factor) {
	return function (input,offset) {
		offset = offset || 0;
		return [((offset+input)*factor).toFixed(2), toUnit].join(" ").trim();
	}
}

var convert = new Array();
convert.push({"name":"milesToKm","unit":"km","factor":"1.60936"});
convert.push({"name":"inchToCm","unit":"cm","factor":"2.54"});

var u = new UnitConversion(convert);

console.log(u.milesToKm(10));
console.log(u.inchToCm(10));