Returns all the elements of an array except the last one.
- Use
Array.prototype.slice()to return all but the last element of the array.
代码实现
const initial = arr => arr.slice(0, -1);
initial([1, 2, 3]); // [1, 2]翻译自：https://www.30secondsofcode.org/js/s/array-without-last-element
