The examples in this article describe JavaScript AOP programming. Share it with everyone for your reference. The details are as follows:
/* // aop({options}); // By: adamchow2326@yahoo.com.au // Version: 1.0 // Simple aspect oriented programming module // support Aspect before, after and around // usage: aop({ context: myObject, // scope context of the target function. target: "test", // target function name before: function() { // before function will be run before the target function console.log("aop before"); }, after: function() { // after function will be run after the target function console.log("aop after"); }, around: function() { // around function will be run before and after the target function console.log("aop around"); } }); */ var aop = (function() { var options = {}, context = window, oFn, oFnArg, targetFn, targetFnSelector, beforeFn, afterFn, aroundFn, cloneFn = function(Fn) { if (typeof Fn === "function") { return eval('[' +Fn.toString()+ ']')[0]; } return null; }, checkContext = function() { if (options.context) { context = options.context; } if (typeof context[(options.target).name] === "function") { targetFnSelector = (options.target).name; targetFn = context[targetFnSelector]; } else if (typeof context[options.target] === "function") { targetFnSelector = options.target; targetFn = context[targetFnSelector]; } if (targetFn) { oFn = cloneFn(targetFn); oFnArg = new Array(targetFn.length); return true; } else { return false; } }, run = function() { context[targetFnSelector] = function(oFnArg) { if (aroundFn){ aroundFn.apply(this, arguments); } if (beforeFn){ beforeFn.apply(this, arguments); // 'this' is context } oFn.apply(this, arguments); if (afterFn){ afterFn.apply(this, arguments); // 'this' is context } if (aroundFn){ aroundFn.apply(this, arguments); } }; }; return function(opt){ if (opt && typeof opt === "object" && !opt.length) { options = opt; if (options.target && checkContext()) { if (options.before && typeof options.before === "function") { beforeFn = options.before; } if (options.after && typeof options.after === "function") { afterFn = options.after; } if (options.around && typeof options.after === "function") { aroundFn = options.around; } run(); } } }; })(); // test examples // ----------------- aop modify global function ---------------// function test(name, age) { console.log("test fn. name = " + name + " age: " + age); } aop({ target: "test", before: function() { console.log("aop before"); }, after: function() { console.log("aop after"); }, around: function() { console.log("aop around"); } }); // run test("adam", 6); // ----------------- aop test modify method in an object ---------------// var myobj = { myName: "testName", sayName: function() { console.log(this.myName); }, childObj: { age: 6, say: function() { console.log(this.age); } } }; aop({ context: myobj, target: "sayName", before: function() { console.log("aop before say name = " + this.myName); }, after: function() { console.log("aop after say name = " + this.myName); }, around: function() { console.log("aop around say name = " + this.myName); } }); // run myobj.sayName(); aop({ context: myobj.childObj, target: "say", before: function() { console.log("aop before say name = " + this.age); }, after: function() { console.log("aop after say name = " + this.age); }, around: function() { console.log("aop around say name = " + this.age); } }); myobj.childObj.say();
I hope this article will be helpful to everyone’s JavaScript programming design.

去掉重复并排序的方法:1、使用“Array.from(new Set(arr))”或者“[…new Set(arr)]”语句,去掉数组中的重复元素,返回去重后的新数组;2、利用sort()对去重数组进行排序,语法“去重数组.sort()”。

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foreach不是es6的方法。foreach是es3中一个遍历数组的方法,可以调用数组的每个元素,并将元素传给回调函数进行处理,语法“array.forEach(function(当前元素,索引,数组){...})”;该方法不处理空数组。


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