Output json once its in Ruby

Question

Possible Duplicate:
Parsing a JSON string in ruby

I've managed to get a bunch of json into a variable in ruby and print it out, through the JSON gem and the following code:

require 'open-uri'
require 'json'

result = JSON.parse(open("https://api.pinboard.in/v1/posts/get?auth_token=username:token&tag=fashion&meta=yes&format=json").read)
puts result

What it returns is this:

{
  "date"=>"2012-09-24T03:35:38Z",
  "user"=>"username",
  "posts"=>[{
      "href"=>"http://example.com/example.jpg",
      "description"=>"this is the description",
      "extended"=>"A full, longer description.",
      "meta"=>"d6f967c9adfbe1eb3763fddbcd993d1b",
      "hash"=>"a46e0e7202d9d56c516a472d8be70d9e",
      "time"=>"2012-09-24T03:35:38Z",
      "shared"=>"yes",
      "toread"=>"no",
      "tags"=>"fashion"
    }
]}

(the line-spacing here is mine, for clarity)

My problem is, I have no idea how to access these keys and values! I've googled and searched but I'm really new to ruby and I'm having a lot of trouble figuring out exactly what I'm supposed to be doing, nevermind the code to do it. Help?

This has nothing to do with json. It is about accessing values within a hash. — sawa, Sep 24 '12 at 15:29
Possible duplicates: http://stackoverflow.com/q/9055096/128421. — the Tin Man, Sep 24 '12 at 15:38

Erez Rabih · Accepted Answer · 2012-09-24T15:10:19.227

2

result["date"] - accesses the date key on the json.

In general result[<key>] accesses the value stored in key.

If you try to access a key that does not exists you will get nil as a result.

Edit: In order to traverse the key/value pairs you can:

result.each do |key, value|
   puts "result[#{key}] = #{value}"
end

edited Sep 24 '12 at 15:10

answered Sep 24 '12 at 15:01

Erez Rabih

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Oh wow, that's embarrassing for me. Thanks! How would I grab the name of the key itself, say if I wanted to loop through all the keys and values and print each key name next to its value? – zakkain Sep 24 '12 at 15:05
You'd use `Hash.keys`, but before that you'd read through [Ruby's documentation](http://www.ruby-doc.org/docs/ProgrammingRuby/html/tut_classes.html) about accessing [arrays](http://www.ruby-doc.org/core-1.9.3/Array.html) and [hashes](http://www.ruby-doc.org/core-1.9.3/Hash.html) which covers all this. – the Tin Man Sep 24 '12 at 15:40

score 0 · Answer 2 · answered Sep 24 '12 at 15:00

0

Do stuff like:

p result["date"]
p result["posts"].size

Look up the documentation for the ruby Array and Hash classes.

answered Sep 24 '12 at 15:00

David Grayson

84,103
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Output json once its in Ruby

2 Answers2