how to get first and last element of array in javascript

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Julia
05 Jun 2018
1The rest parameter can only use at the end not anywhere else in the destructuring so it won't work as you expected.
2
3Instead, you can destructor certain properties(an array is also an object in JS), for example, 0 for first and index of the last element for last.
4
5let array = [1,2,3,4,5,6,7,8,9,0]
6
7let {0 : a ,[array.length - 1] : b} = array;
8console.log(a, b)
9Expand snippet
10Or its better way to extract length as an another variable and get last value based on that ( suggested by @Bergi) , it would work even there is no variable which refers the array.
11
12let {0 : a ,length : l, [l - 1] : b} = [1,2,3,4,5,6,7,8,9,0];
13console.log(a, b)
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Kayna
19 Aug 2019
1let {0 : a ,length : l, [l - 1] : b} = [1,2,3,4,5,6,7,8,9,0];
2console.log(a, b)
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