Retrieving an array from a multidimensional array

Question

My response from an API is coming in like:

[0] = "[Identity[id=95571, type=start, userId=d12345, processId=95567]]" [1] = "[Identity[id=95572, type=start, userId=d67890, processId=95568]]" etc

Lets call the above arr.

I want to retrieve all the userIds

I have tried:

all_users = arr.collect {|ind| ind[2]}

But this is obviously incorrect. What am I missing?

Thanks

it is converted to string before being sent, perhaps there is a ruby way to convert it back to a proper array? — user3437721
– user3437721, Commented Sep 3, 2015 at 18:53

Mori · Accepted Answer · 2015-09-03 16:23:02Z

Your array elements are strings, so can use string methods to extract parts from them, e.g.

arr.map { |e| e.match(/\[id=(/d+),/)[1] }

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