这里是SomeBottle的摸鱼学习笔记，包含一些题解 | Here are the learning notes written by an amateur bottle, some problem solutions are included.
License: Creative Commons Attribution Share Alike 4.0 International
看到了这个。
其实闭包可以用结构体来模拟，很多语言也是怎么做的，比如如下闭包：
let a = () => 1 + 2;
print(a());
展开为:
class A {
function call() {
return 1 + 2;
}
}
let a = new A;
print(a.call());
那么如果要捕获作用域里的变量呢？
let cat = 114513;
let a = () => 1 + cat;
print(a());
展开为:
class A {
var _cat;
A(cat) {
this._cat = cat
}
function call() {
return 1 + this._cat;
}
}
let cat = 114513;
let a = new A(cat);
print(a.call());
相信已经懂了吧，要传入参数也是一样。
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