d3js rebind playground

rebind.js

function rebind(target, source) {
  var i = 1, n = arguments.length, method
  hile (++i < n) target[method = arguments[i]] = innerRebind(target, source, source[method])
    return target
  }
  
function innerRebind(target, source, method) {
  return function() {
	  if ( isFunctionA(source[method])) {
		var value = method.apply(source, arguments);
	  return value === source ? target : value;
	}
	  
	return source[method]
  }
}
  
function isFunction(object) {
  return object && getClass.call(object) == '[object Function]';
}