Remove last item from array

2018-06-06 04:06:35

I have the following array.

var arr = [1,0,2];

I would like to remove the last element ie 2.

I used arr.slice(-1); but it doesn't remove the value.

使用拼接（索引，howmany）

arr.splice(-1,1)

let fruit = ['apple', 'orange', 'banana', 'tomato'];
let popped = fruit.pop();

console.log(popped); // "tomato"
console.log(fruit); // ["apple", "orange", "banana"]

MDN上Array.prototype.pop的文档

You can do this using .slice() method like:

arr.slice(0, -1);    // returns [1,0]

Here is a demo:

var arr = [1, 0, 2];
var newArr = arr.slice(0, -1);    // returns [1,0]

console.log(newArr);
$('#div1').text('[' + arr + ']');
$('#div2').text('[' + newArr + ']');

<script src="http://code.jquery.com/jquery.min.js"></script>
<b>Original Array    : </b>
<div id="div1"></div>
<br/>
<b>After slice(0, -1): </b>
<div id="div2"></div>

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