javascript - 创建一个顺序数组，从一定数量开始，有一定数量的项目

Question

有没有一种优雅的方法(没有 for 循环)在 Javascript 中创建一个顺序数组，它从某个数字开始并具有一定数量的项目。例如:

从 2017 开始，有 4 项将如下所示:

[2017, 2018, 2019, 2020]

谢谢

Answer 1

你可以使用 Array.from带有值的回调。

The Array.from() method creates a new Array instance from an array-like or iterable object.

[...]

Array.from() has an optional parameter mapFn, which allows you to execute a map function on each element of the array (or subclass object) that is being created. More clearly, Array.from(obj, mapFn, thisArg) has the same result as Array.from(obj).map(mapFn, thisArg), except that it does not create an intermediate array. This is especially important for certain array subclasses, like typed arrays, since the intermediate array would necessarily have values truncated to fit into the appropriate type.

var items = 4,
    start = 2017,
    array = Array.from({ length: items }, (_, i) => start + i);

console.log(array);