README.md

if you want to log the call parameters for function xyz, add this is the first line of xyz:

function xyz(p1, p2) {
    debugFunctionCall('xyz', arguments);
    ...
}

then if you call

xyz(2, "stuff", {a:2});

it prints

(xyz 2 "stuff" {"a":2})

debugFunctionCall.js

function debugFunctionCall(functionName, args) {
    var o = [];
    o.push('(');
    o.push(functionName);
    for (var i = 0, I = args.length; i < I; ++i) {
        o.push( JSON.stringify(args[i]) );
        o.push(' ');
    }
    o.pop();
    o.push(')');
    console.log( o.join('') );
}