40 lines
857 B
JavaScript
40 lines
857 B
JavaScript
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function sum(a){
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return function(b){
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return a + b;
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}
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}
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console.log(sum(1)(2));
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console.log(sum(5)(-1));
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function byField(Field){
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return (a,b) => a[Field] > b[Field]? 1: -1;
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}
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function makeArmy() {
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let shooters = [];
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let i = 0;
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while (i < 10) {
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let id = i;
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let shooter = function() { // 创建一个 shooter 函数，
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console.log( id ); // 应该显示其编号
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};
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shooters.push(shooter); // 将此 shooter 函数添加到数组中
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i++;
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}
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// ……返回 shooters 数组
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return shooters;
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}
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let army = makeArmy();
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// ……所有的 shooter 显示的都是 10，而不是它们的编号 0, 1, 2, 3...
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army[0](); // 编号为 0 的 shooter 显示的是 10
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army[1](); // 编号为 1 的 shooter 显示的是 10
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army[2](); // 10，其他的也是这样。
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