calc.js

jint.modload["calc"] = "Calculator";
jint.docvars["calc"] = "Tools for a calculator.";
var calc = calc || {}; //namespace

jint.docvars["calc.calch"] = "A higher-order function for a calculator.";
calc.calch = function(f, args) {
    var retval = args[0];
    for( var i = 1; i < args.length; ++i ) {
        switch (f) {
            case '+': retval = retval + args[i]; break;
            case '-': retval = retval - args[i]; break;
            case '*': retval = retval * args[i]; break;
            case '/': retval = retval / args[i]; break;
            default: break;
        }
    }
    return retval;
};

jint.docvars["calc.add"] = "Add an arbitrary amount of arguments.";
calc.add = function() { return calc.calch('+', arguments); };
jint.docvars["calc.sub"] = "Subtract an arbitrary amount of arguments.";
calc.sub = function() { return calc.calch('-', arguments); };
jint.docvars["calc.mul"] = "Multiply an arbitrary amount of arguments.";
calc.mul = function() { return calc.calch('*', arguments); };
jint.docvars["calc.div"] = "Divide an arbitrary amount of arguments.";
calc.div = function() { return calc.calch('/', arguments); };