Falcon and the Data description language

[Roberto Giacomelli]

Hi all.
I'm new here. My first question is intended to asses a migration to Falcon from a Lua project that involves SQLite3/Postgresql and LaTeX as reporting tool. So the questions:
I have some data structured in the Lua table format, stored in a plain text file.
This is an example:
[code]
plant {
   id = 1,
   codicefabbricato = '8084.8101',
   stairs = 1,
   address = 'Cabrini Street',
   zipcode = '54027',
   number = '154',
   comune = 14,
   allPrivate = 2,
   allPublic = 2,
   miscode = '5450531531',
}
[/code]
This structure is a Lua table passed to the 'plant()' function.
Is there anything to similar in Falcon language?
How I can process this kind of data description format in the Falcon language?
Thank you.
Roberto

[Paul Davey]

Hi Roberto,

In falcon the equivalent data structure to the table is a dictionary, they are written as [ name => value, name2 => value2, ...] this can be used to replace the lua table.

The fact that lua treats name { ... } as a call is syntactic sugar which is not reflected in falcon so to achieve the same thing you would have to surround the dictionary in () so your example would become.

[code]
plant( [

   id => 1,
   codicefabbricato => '8084.8101',
   stairs => 1,
   address => 'Cabrini Street',
   zipcode => '54027',
   number => '154',
   comune => 14,
   allPrivate => 2,
   allPublic => 2,
   miscode => '5450531531',

] )

[/code]

If you kept the same scheme in falcon.

Roberto

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[Giancarlo Niccolai]

> --

We have a Json module that does pretty that; plus, it creates data that
is interchangeable with Java and Javascript.

Gian.

[Roberto Giacomelli]

Uhm,

I don't know JSON... Would you explain something to me with a basic code example?

Thank you.

In this moment I try to performe a connection to a SQLite3 database

It's my first Falcon script...

R.

2013/1/4 Giancarlo Niccolai <g...@niccolai.cc>

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Roberto Giacomelli

[Steven Oliver]

Here is an example of using SQLite if that helps you any:

https://groups.google.com/forum/#!topic/falconpl/bVePM1TPlyo

Steven N. Oliver

[Paul Davey]

JSON stands for JavaScript Object Notation.  It is a serialisation format that is mostly a subset of YAML. 

Basically it looks a lot like lua tables, but it also has arrays using square brackets so an example would be 

{

 a = "blah",

 b = 1

 c = [ 1, 2 ,3 ]

 d = [ "a", 2, "b"]

 e = [ { b = 3}, { a = 5}]

}

this will create an object (JSON name for a dictionary) with several members, a is the string blah, b is the integer 1, c is an array of integers 1 to 3, d is an array of mixed strings and integers, e is an array of objects.

Falcon has a module that can serialise and deserialise objects into JSON format for storing on disk or sending over a network.