var a = 10; var obj1 = { a: 20, fn: (function() { this.a *= 2; a = 5; var a = 6; return function() { this.a *= a; console.log(a) } })() } var obj2 = { a: 30 } var fn = obj1.f...
when is the closure generated? Is it when the function is defined or when it is executed? = add = ...
function Demo(name) { this.name = name; } var getSingle = function(fn) { var result; return function() { console.log(arguments.length); return result || (result = fn.apply(this, arguments)); } }; const aa = new getSingle(D...
The getInitializer function in the autoload_static.php of Composer accesses the private properties of the ClassLoader class, causing the IDE (PhpStorm) to prompt "member has private access " error, as shown in the red box in the figure: in fact, t...
there are functions as follows package main import "fmt " func intSeq () func () int { i := 0 return func() int { i += 1 return i } } func main () { nextInt := intSeq() fmt.Println(nextInt()) fmt.Println(nextInt()) fmt.Println(nextInt()) ...
function student () { var name = xxx ; var getName = function () { return name } var setName = function (newName) { name = newName; } return { getName: getName, setName: setName, name: na...
function Ninja(){ var feints = 0; this.getFeints = function(){ return feints; }; this.feint = function() { feintsPP; }; } var ninja1 = new Ninja(); ninja1.feint(); console.log(ninja1.feints); console.log(ninja1.getFein...
recently I have read articles about garbage collection mechanism and closures, but I still don t have a deep understanding of them, and there are some doubts. I hope some bosses can give me an answer . my understanding is that local variables are recy...
function fn1(){ var a = 6; function fn2(){ alert(a) ; } return fn2; } var f = fn1(); f() alert 6 fn1() as in the above code, the variable f can be assigned to alert 6, but there is no response when calling fn1 directly. What is the...
closure, which leads to memory leakage due to the fact that the internal variables of the parent function cannot be reclaimed by the recycling mechanism; problem, ...
first of all, there is a front-end classic closure interview question. for(var i = 0;i<5;iPP){ setTimeout(()=>{ console.log(i) },1000*i) } Everyone knows that the answer to this question is to type 5 every second. then the interviewer a...