How to get a value in a multidimensional array?

Question

I am using Rails 3.1.0 and I would like to get a particular value from a multidimensional array. That is, I have the following

array = [ ['Text1', 's1'], ['Text2', 's2'], ['Text3', 's3'] ]

and, for example, I would like to search in the above array the string s3 so to get the corresponding value Text3. The same for s1 so to get the Text1 and for s2 so to get the Text2.

How can I make that?

steenslag · Accepted Answer · 2012-02-20 20:25:44Z

3

For smallish arrays and infrequent lookups you can keep the array:

array = [ ['Text1', 's1'], ['Text2', 's2'], ['Text3', 's3'] ] p array.rassoc('s3').first #=> 'Text3'

answered Feb 20, 2012 at 20:25

steenslag

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1 Comment

Niklas B. Over a year ago

+1, wow, never seen that method before... Is there a particular reason why this is included? Because I've never seen another case like this where this would actually be useful.

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