Re: [Lift] Re: intro to lift-json?

[Jonas Bonér]

I like that.
But still hate JSON ;-)

2009/11/20 Joni Freeman freeman.j...@gmail.com:
 Hi,

 There's several ways to get values from JSON.

 1. Use LINQ style query comprehension:

 for { JField(bar, JInt(x)) - json } yield x

 2. Extract values with case classes

 implicit val formats = net.liftweb.json.DefaultFormats
 case class Foo(foo: Bar)
 case class Bar(bar: Int)
 json.extract[Foo]

 3. XPath style

 val JField(bar, JInt(x)) = json \ foo \ bar

 Cheers Joni

 On 19 marras, 22:20, harryh har...@gmail.com wrote:
 Is there a basic intro to lift-json floating around anywhere?  I'm
 having a bit of trouble getting started with a couple basic things.
 For example if a have a JObject that corresponds to:

 {
   foo : {
     bar : 999
   }

 }

 How do I get the 999 (as an int) out of the JObject?  I'm sure this is
 simple, just a bit confused on the basics.

 -harryh

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Re: [Lift] Re: intro to lift-json?

[Ross Mellgren]

JArray is a case class that wraps a List. It's not an array-of-list or  
anything, just that the actual elements are stored in a List that  
JArray holds.

-Ross

On Nov 19, 2009, at 5:12 PM, harryh wrote:

 Why does this parse into a JArray(List(..)) intead of a JArray(..) ?

 -harryh

 scala parse( { ids : [1, 2] } )
 res5: net.liftweb.json.JsonAST.JValue = JObject(List(JField(ids,JArray
 (List(JInt(1), JInt(2))


 On Nov 19, 3:51 pm, Tim Nelson tnell...@gmail.com wrote:
 Have you seen the readme file?

 http://github.com/dpp/liftweb/tree/master/lift-base/lift-json/

 On Thu, Nov 19, 2009 at 2:20 PM, harryh har...@gmail.com wrote:
 Is there a basic intro to lift-json floating around anywhere?  I'm
 having a bit of trouble getting started with a couple basic things.
 For example if a have a JObject that corresponds to:

 {
  foo : {
bar : 999
  }
 }

 How do I get the 999 (as an int) out of the JObject?  I'm sure  
 this is
 simple, just a bit confused on the basics.

 -harryh

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