How to convert JSON to a Ruby hash

Question

I have a JSON object holding the following value    value     val   test   val1   test1   val2   test2     I want to loop through it in Ruby to get the key value pairs  When I use  each  it doesn t iterate through the object because it is not in the Ruby hash form    value     val   gt  test   val1   gt  test1   val2   gt  test2     How can I convert the above JSON object to a Ruby hash

User · Answer

I m surprised nobody pointed out JSON s    method  which makes it very easy and transparent to decode and encode from to JSON      If object is string-like  parse the string and return the parsed result as a Ruby data structure  Otherwise generate a JSON text from the Ruby data structure object and return it    Consider this   require  json   hash     val   test   val1   test1   val2   test2       gt    val  gt  test    val1  gt  test1    val2  gt  test2   str   JSON hash      gt      val     test     val1     test1     val2     test2       str now contains the JSON encoded hash   It s easy to reverse it using   JSON str      gt    val   gt  test    val1   gt  test1    val2   gt  test2     Custom objects need to s defined for the class  and inside it convert the object to a Hash then use to json on it

User · Answer

You can use the nice hash gem  https   github com MarioRuiz nice hash  require  nice hash  my string      val   test   val1   test1   val2   test2       on my hash will have the json as a hash  even when nested with arrays my hash   my string json    you can filter and get what you want even when nested with arrays vals   my string json  val1   val2     even you can access the keys like this  puts my hash  val1 puts my hash val1 puts my hash  val1

User · Answer

Assuming you have a JSON hash hanging around somewhere  to automatically convert it into something like WarHog s version  wrap your JSON hash contents in  q hsh  tags    This seems to automatically add all the necessary escaped text like in WarHog s answer

User · Answer

What about the following snippet   require  json  value      val   test   val1   test1   val2   test2    puts JSON parse value      gt    val   gt  test   val1   gt  test1   val2   gt  test2

User · Answer

You could also use Rails  with indifferent access method  so you could access the body with either symbols or strings   value      val   test   val1   test1   val2   test2    json   JSON parse value  with indifferent access   then   json  val     gt   test   json  val      gt   test

User · Answer

Have you tried  http   flori github com json    Failing that  you could just parse it out  If it s only arrays you re interested in  something to split the above out will be quite simple

[ruby] How to convert JSON to a Ruby hash

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