how can i have the first 3 elements of an array of variable length in Javascript [duplicate]

Question

i would like to get the first 3 elements of an array of variable length. i've sorted my array and i would like to get a Top 3.

here's what i've done :

var diffSplice = this.users.length - 1;
return this.users.sort(this.triDec).splice(0,diffSplice)

my "solution" work only for an array of 4 element ( -1 )

Is there a better way to use the splice method ?

Thanks for your help

Nina Scholz · Accepted Answer · 2017-08-09 15:58:19Z

4

You could use Array#slice for the first three items.

return this.users.sort(this.triDec).slice(0, 3);

answered Aug 9, 2017 at 15:58

Nina Scholz

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Comments

marvel308 · Accepted Answer · 2017-08-09 15:58:49Z

1

Don't you want to use a const value for diffSplice like

var diffSplice = 3;
return this.users.sort(this.triDec).slice(0,diffSplice)

try running

let arr = [1, 2, 3, 4, 5];
console.log(arr.slice(0, 3));

answered Aug 9, 2017 at 15:58

marvel308

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Luuuud · Accepted Answer · 2017-08-09 15:59:06Z

-1

Fill out the deletecount for Splice:

var sortedArray = this.users.sort(this.triDec);
return sortedArray.splice(0, 3);

check MDN

answered Aug 9, 2017 at 15:59

Luuuud

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Why the downvote? For using splice instead of slice? OP didn't mention the original array should be maintained.