Put hash values into array RUBY

Question

I am using ruby 1.9.3 and am receiving the following hash back from an API GET request:

puts api_response

{"id"=>"5172901-01", "firstName"=>"a", "lastName"=>"b", "email"=>"[email protected]", "gender"=>"U", "dateOfBirth"=>"1983-08-05"}
{"id"=>"2072902-01", "firstName"=>"c", "lastName"=>"d", "email"=>"[email protected]", "gender"=>"U", "dateOfBirth"=>"1955-04-01"}
{"id"=>"1072903-01", "firstName"=>"e", "lastName"=>"f", "email"=>"[email protected]", "gender"=>"M", "dateOfBirth"=>"1987-12-31"}
{"id"=>"2072817-04", "firstName"=>"g", "lastName"=>"h", "email"=>"[email protected]", "gender"=>"U", "dateOfBirth"=>"1985-04-07"}

How can i put each id into it's own array? Something like:

api_response[:id].each do |x|
  api_response_array << x
end

The hashes aren't seperated by commas and I think that is what's throwing me off.

What is api_response? is it a Hash or a String?

fguillen
– fguillen

2013-08-20 18:01:51 +00:00
Commented Aug 20, 2013 at 18:01 — fguillen
– fguillen, Commented Aug 20, 2013 at 18:01

Benno · Accepted Answer · 2013-08-20 18:02:58Z

4

try this:

api_response.map { |x| x["id"] }

For more documentation, check out Enumerable#map

EDIT:

The reason the hashes aren't separated by commas is because of how Kernel#puts works on an array. Try puts [1,2,3] and see for yourself: each element goes on its own line, without commas.

api_response is an array of hashes, so my answer above takes each hash out of the array, and extracts the "id" field.

answered Aug 20, 2013 at 18:02

Benno

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Comments

jaeheung · Accepted Answer · 2013-08-20 18:04:57Z

1

resp_str = <<EOS
{"id"=>"5172901-01", "firstName"=>"a", "lastName"=>"b", "email"=>"[email protected]", "gender"=>"U", "dateOfBirth"=>"1983-08-05"}
{"id"=>"2072902-01", "firstName"=>"c", "lastName"=>"d", "email"=>"[email protected]", "gender"=>"U", "dateOfBirth"=>"1955-04-01"}
{"id"=>"1072903-01", "firstName"=>"e", "lastName"=>"f", "email"=>"[email protected]", "gender"=>"M", "dateOfBirth"=>"1987-12-31"}
{"id"=>"2072817-04", "firstName"=>"g", "lastName"=>"h", "email"=>"[email protected]", "gender"=>"U", "dateOfBirth"=>"1985-04-07"}
EOS


resp_array = resp_str.lines.map {|line| eval(line) }
id_array = resp_array.map {|h| h['id']}

puts id_array.inspect

answered Aug 20, 2013 at 18:04

jaeheung

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