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function dropRight(arr, n = 0) { return n < arr.length ? arr.slice(0, arr.length - n) : []; } dropRight([1,2,3,4,5], 2)
function dropRight(arr, n = 0) { return arr.splice(0, arr.length - n) } dropRight([1,2,3,4,5], 2)
function dropRight(arr, n = 0) { return arr.slice(0, -n) } dropRight([1,2,3,4,5], 2)
function dropRight(arr, n = 0) { arr.length = Math.max(arr.length - n, 0) return arr } dropRight([1,2,3,4,5], 2)
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slice
splice
slice 另一种
修改 length
The text was updated successfully, but these errors were encountered: