Looping ruby hash and output specific element

Question

I am trying to loop through a hash for specific data to output. If I want to output all usernames. This is how I can do it one at a time but its not what I want.

puts username = json["users"][0]["username"]
puts username = json["users"][1]["username"]

also tried

json.each { |x| puts json["users"][x]["username"]}

This is the hash structure

{"success"=>true, "users"=>[{"id"=>"1523493", "username"=>"myname","age"=>"21"},{"id"=>"653172", "username"=>"anothername","age"=>"65"}]}

sorry I didnt make my question clear enough. I am wanting to iterate the hash for "username" and then i can loop through each username and output specific data before moving to next username

also users.map { |entry| puts entry["usersname"]} gives me an error no implicit conversion of String into Integer — Dr.Rabbit
– Dr.Rabbit, Commented Nov 15, 2015 at 7:15

Amit Badheka · Accepted Answer · 2015-11-15 08:41:23Z

1

You can loop your json like this

json["users"].each do |u|
   username = u["username"]
   #Do some logic with username
   #like user = User.find_by_username(username)
end

answered Nov 15, 2015 at 8:41

Amit Badheka

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Zoran · Accepted Answer · 2015-11-15 06:52:17Z

1

You can get all the usernames in one go by doing something like this:

json = { "users" => [{"id"=>"1523493", "username"=>"myname"},{"id"=>"653172", "username"=>"anothername"}] }

json["users"].map { |user| user["username"] }
# => ["username", "anothername"]

The above will provide you with an array of usernames to do with as you see fit. :)

Hope it helps!

edited Nov 15, 2015 at 6:52

answered Nov 15, 2015 at 6:45

Zoran

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1 Comment

Dr.Rabbit Over a year ago

Sorry I didnt make my question clear enough I think. For each occurrence of "username" I would like to use it as the loop so I then can extract the elements I need. also I didnt post the proper hash and have now corrected it.

Cary Swoveland · Accepted Answer · 2015-11-15 08:22:27Z

0

h = {"success"=>true, 
     "users"=>[{"id"=>"1523493", "username"=>"myname","age"=>"21"},
               {"id"=>"653172", "username"=>"anothername","age"=>"65"}]}

h["users"].map { |user| user["username"] }
   #=> ["myname", "anothername"]

edited Nov 15, 2015 at 8:22

answered Nov 15, 2015 at 6:45

Cary Swoveland

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1 Comment

Dr.Rabbit Over a year ago

that does work great but, I have updated my quest because I wasnt clear enough and i posted the wrong hash structure, sorry.

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