Splitting array in three different arrays of maximum three elements

Question

I have an array:

array = [12, 13, 14, 18, 17, 19, 30, 23]

I need to split this array into arrays of maximum three elements each:

[12, 13, 14] [18, 17, 19] [30, 23]

How can I do this?

This question has already been asked. Here is a link to it: http://stackoverflow.com/questions/2699584/how-to-split-chunk-a-ruby-array-into-parts-of-x-elements — Sari Rahal, Jun 11 '15 at 12:14

score 1 · Answer 1 · answered Jun 11 '15 at 12:15

1

Take a look at Enumerable#each_slice:

foo.each_slice(3).to_a
#=> [["1", "2", "3"], ["4", "5", "6"], ["7", "8", "9"], ["10"]]

If you're using rails you can also use in_groups_of:

foo.in_groups_of(3)

answered Jun 11 '15 at 12:15

Sari Rahal

score 1 · Accepted Answer · answered Jun 11 '15 at 12:16

1

Try this... Using Enumerable#each_slice to slice array x value

array  = [12, 13, 14, 18, 17, 19, 30, 23]
array.each_slice(3)
array.each_slice(3).to_a

answered Jun 11 '15 at 12:16

Sharvy Ahmed · Answer 3 · 2015-06-11T12:32:46.373

By this time, I hope you got your answer. If you are using Rails, you can go with in_groups, you won't have to call to_a explicitly then :

array.in_groups(3)
# => [[12, 13, 14], [18, 17, 19], [30, 23, nil]]

array.in_groups(3, false)
# => [[12, 13, 14], [18, 17, 19], [30, 23]]

One more advantage of using in_groups is, you can preserve the array size (strictly). It will fill_with = nil to maintain the array size.

3 Answers3