Get the last two positions of an array [duplicate]

问题

This question already has answers here:

In a javascript array, how do I get the last 5 elements, excluding the first element? (5 answers)

Closed 2 years ago.

I would like to know how can I obtain the last two elements of this array like this:

array = [1,5,7,8,10,12,23,24];

I am trying to obtain with slice() function but it doesn´t work for me, beacuse I always I want to obtain the last two positions.

array = [23,24];

I hope that anyone can help me in this question.

Regards!

回答1:

Use Array#slice with negative index.

var array = [1,5,7,8,10,12,23,24];

console.log(array.slice(-2));

You can learn more about this method also here.

回答2:

array = [1,5,7,8,10,12,23,24];


console.log(array.slice(-2))

Use slice -2

回答3:

aray.prototype.splice() also

Note: Splice it will update the original array also

var array = [1,5,7,8,10,12,23,24];

console.log(array.splice(-2));

来源：https://stackoverflow.com/questions/42368587/get-the-last-two-positions-of-an-array