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Don't use array.length-1 to get the last item of the array

2022-08-09 22:07:00 【Maple moving forward】

Please don't use array.length-1 to get the last item of the array. There is a more convenient and concise method: at , which is a method on the array prototype.

mdn:

The

at() method takes an integer value and returns the item at that index, positive and negative numbers are allowed.Negative integers count down from the last item in the array.

eg:

const a = [1,2,3];const lastItem = a.at(-1);console.log(lastItem ); // 3

Negative numbers start from -1 to represent the last digit.

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