Trim varying sized array (but always over 20) down to specific length (10)

Question

Let's say I'm working with an array that has a bunch of items, always over 20, but never the same amount. I want to trim that array to just 10 items. The answer here doesn't take into account varying sized arrays.

What's a good way to do this?

Until you give more specifics as to any criterion for what to keep, or show some code, I'm going with: `array.slice(0, 10)`. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice?redirectlocale=en-US&redirectslug=JavaScript%2FReference%2FGlobal_Objects%2FArray%2Fslice — Scott Mermelstein, Aug 20 '13 at 16:00

score 4 · Accepted Answer · answered Aug 20 '13 at 15:58

4

You can slice an array with Array.slice() :

new_array = old_array.slice(0,10);

FIDDLE

answered Aug 20 '13 at 15:58

adeneo

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That was too easy. Thanks adeneo! – dallen Aug 20 '13 at 16:00

score 2 · Answer 2 · answered Aug 20 '13 at 16:00

2

This trims the array in place:

arr.length = 10;

answered Aug 20 '13 at 16:00

Felix Kling

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Trim varying sized array (but always over 20) down to specific length (10)

2 Answers2