Creates an array of n
-tuples of consecutive elements.
- Use
Array.prototype.slice()
andArray.prototype.map()
to create an array of appropriate length. - Populate the array with
n
-tuples of consecutive elements fromarr
. - If
n
is greater than the length ofarr
, return an empty array.
代码实现
const aperture = (n, arr) =>
n > arr.length
? []
: arr.slice(n - 1).map((v, i) => arr.slice(i, i + n));
aperture(2, [1, 2, 3, 4]); // [[1, 2], [2, 3], [3, 4]]
aperture(3, [1, 2, 3, 4]); // [[1, 2, 3], [2, 3, 4]]
aperture(5, [1, 2, 3, 4]); // []
翻译自:https://www.30secondsofcode.org/js/s/consecutive-element-subarrays