How to access value in a nested array or subarray using a Ruby method?

Question

This is the array:

array = [ 1, 2, 3, [4, 5, 6] ]

Can I use "delete_at" method to delete the "5"?

array.delete_at[x] method

What would the correct syntax be?

Do you mean you want to delete the element array[3][1] (whatever its value) or do you want to delete the 5, not knowing where it is in the array (and assuming the array has a particular structure)? — Cary Swoveland
– Cary Swoveland, Commented Jul 9, 2016 at 3:47

Daniel Krawieczyński · Accepted Answer · 2016-07-08 22:13:53Z

3

Your 'array' has only 4 elements. If it's subarray you probably should do something like that

array[3].delete_at(1)

to delete the second element of subarray that's a fourth element of 'array' array.

edited Jul 8, 2016 at 22:13

answered Jul 8, 2016 at 21:55

Daniel Krawieczyński

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BrunoF · Accepted Answer · 2016-07-09 12:11:06Z

-2

Welcome to Stack Overflow!

This one is longer and less efficient but it allows you to select the item to be deleted by value instead of by position (array index). That's useful when you don't know the position.

array.map {|x| x.delete(5) if x.instance_of?(Array); x}

edited Jul 9, 2016 at 12:11

answered Jul 8, 2016 at 22:36

BrunoF

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