How do I get a specific array index in ruby?

Question

I have an array like this

data = [ { "email"=>"[email protected]", "id"=>001, "name"=>"Name 1" }, { "email"=>"[email protected]", "id"=>002, "name"=>"Name 2" }, ]

and I want to select by name

name = data.select {|x| x[:name] == "Name 1"}

the result is

[ { "email"=>"[email protected]", "id"=>001, "name"=>"Name 1" } ]

And I get what I want, but what if I want to just get the id?

I expect results like this: 001

Sebastián Palma · Accepted Answer · 2020-05-12 09:50:24Z

There are different ways to get what you need, depending on the scenario in which you are.

If you need only the id key/value from a single object, you can use find:

data.find { |x| x['name'] == 'Name 1' }['id'] # 1

In the other hand, if you need more than one, and using select you filter them, then you can map the id from every resulting object:

data.select { |x| x['name'] == 'Name 1' }.map { |x| x['id'] } # [1]

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