Function countdown

test/curl.js:205–213

* Returns a function that when executed, executes a lambda function, * but only executes it the number of times stated by howMany. * When done executing, it executes the completed function. Each callback * function receives the same parameters that are supplied to the * returned function eac

(howMany, lambda, completed)

	 * @returns {Function}
	 */
	function countdown (howMany, lambda, completed) {
		var result;
		return function () {
			if (--howMany >= 0 && lambda) result = lambda.apply(undef, arguments);
			// we want ==, not <=, since some callers expect call-once functionality
			if (howMany == 0 && completed) completed(result);
			return result;
		}
	}

	core = {