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Copy pathreturnFunctionTest.js
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66 lines (53 loc) · 1.08 KB
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/**
* 返回闭包不要引用任何循环计数
*
* 闭包是携带状态的函数
* Created by liufengkai on 16/6/26.
*/
function sum(arr) {
return arr.reduce(function (x, y) {
return x + y;
});
}
var r = sum([1, 2, 3, 4]);
console.log(r);
function count() {
var arr = [];
for (var i = 1; i <= 3; i++) {
arr.push((function (n) {
// return function () {
// return n * n;
// }
return n * n;
})(i));
}
return arr;
}
var results = count();
var f1 = results[0];
var f2 = results[1];
var f3 = results[2];
console.log(f1);
console.log(f2);
console.log(f3);
var lfkdsk = {
name: "lfk",
lll: function () {
return this.name;
}
};
console.log(lfkdsk.lll());
function create_counter(initial) {
var x = initial || 0;
return {
inc: function () {
x += 200;
return x;
}
}
}
var fun = create_counter;
console.log(create_counter().inc());
console.log(create_counter(100).inc());
console.log(fun(111).inc());
console.log(fun(1).inc());