How do I convert every two value of array into its own array in ruby?

Question

I have an array which structure [a, [b], c, [d], ...], for example:

array = [0, [1], 2, [1]]

And I need:

[[0, 1], [2, 1]]

How do I do it? :P

Update:

I was wondering how wil handle this array

array = [0, [], 1, [], 2, []]

into

[[0, 1], [2, 1]]

That is remove the empty ones and merge as shown above accordingly.

Thanks :)

tokland · Accepted Answer · 2013-02-17 08:56:52Z

2

I'd write:

array.each_slice(2).map { |x, ys| [x, ys.first] }
#=> [[0, 1], [2, 1]]

Note that you can also write map { |x, (y)| [x, y] } though it's certainly a cryptic unpacking.

answered Feb 17, 2013 at 8:47

tokland

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2 Comments

Hello there, can you help me with the updated question/section above? .Thank you :)

actually its ok. i got it. :)

halfelf · Accepted Answer · 2013-02-17 08:26:47Z

2

array.flatten.each_slice(2).to_a

answered Feb 17, 2013 at 8:26

halfelf

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Hello there, can you help me with the updated question/section above? .Thank you :)

actually its ok. i got it.