Javascript快捷方式，将字符串追加到数组的所有值？ [英] Javascript shortcut, to append string into all the values of array?

问题描述

我有一个数组= [a，b，c];

我想要的是我有一个字符串，让我们说你好，我想附加到这个数组的每个值。

What I want is i have an string let us say "Hello", that I want to append to each and every value of this array.

我的预期输出是类似的

["Hello_a", "Hello_b", "Hello_c"]

javascript中是否有任何快捷方式可以执行此操作，而不使用任何循环。

Is there any shortcut in javascript to perform this operation, without using any loop .

任何帮助都是赞赏！

谢谢

推荐答案

尝试使用 Array.prototype.map（）在此上下文中，

Try to use Array.prototype.map() at this context,

var yourArray = ["a", "b", "c"];
var transformed = yourArray.map(function(item){
  return "Hello_" + item;
});
console.log(transformed); // ["Hello_a", "Hello_b", "Hello_c"]

你也可以使用胖箭如果您的用户使用最新浏览器进行更新，则会发挥作用。

Also you can use fat Arrow functions if users of you are updated with latest browsers.

var yourArray = ["a", "b", "c"];
var transformed = yourArray.map(item => "Hello_" + item);
console.log(transformed); // ["Hello_a", "Hello_b", "Hello_c"]

作为旁注，你必须确定箭头功能，它会强行使用词汇这个。

As a side note, you have to sure about arrow functions that it will forcibly use lexical this inside of it.

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