is it possible to save lua tables as json table through Gideros ?

zoolax · January 2013

Hi
I am lua programmer who used c*a sdk for couple of years,
I am in the process of switching over to Gideros(Means I am learning the apis).
I save json tables in c* sdk using json.decode and json.encode (typical lua api).
and you define the path by doing:

local path = system.pat*****( "data.txt", system.Do****** )
local fhd = io.open( path )

then laster you just encode that as a json table.

A.how is that translate in Gideros?
B.what is the equivalent to "system.D***********" ?

Through this switch over which should not be that difficult at all.
You probably see me asking lots of things here and there:)
Thanks in advance

OZApps · January 2013

short answer to your question -> Yes

you use it in the same way as you do in C*SDK

as for the question of system.xxDirectory, you prefix the files with a
|R| for resource
|T| for temporary
|D| for Documents

so the file name would be "|D|data.txt" for documents directory

there are plenty of sources for learning to use Gideros. You can follow my blogs on http://howto.oz-apps.com which has a couple of articles on using gideros, then there is http://appcodingeasy.com/ that has quite a lot of sample code and you can also have a look at my book Learn Lua for iOS Game Development link in the signature for more details.

OZApps · January 2013

another very important resource that everyone could miss is included with the Gideros Studio package, it is found in the documentation directory and contains a couple of html files that explain about events, file_system (including what you asked)

zoolax · January 2013

another very important resource that everyone could miss is included with the Gideros Studio package, it is found in the documentation directory and contains a couple of html files that explain about events, file_system (including what you asked)

Hi OZApps,
I know about your blog since the day I started learning lua ,and c*sdk.
I have even got your book,right away when it was still just a pdf .
It is very well written for a beginner to understand.
That is actually is the main source for me in learning Gideros,
I am somehow comfortable with lua,and still learning.
Gideros apis seems easy enough to understand.
Your performance speed comparison in your blog is the main reason I want to switch to Gideros Mobile:)
c*sdk is not bad,but Gideros speed on android speek for itself.
I hope to see you around more:)
Thanks for your response.

ar2rsawseen · January 2013

@zoolax here is an easy lib for saving and loading variables and tables
http://appcodingeasy.com/Gideros-Mobile/Save-and-load-data-module-for-Gideros-Mobile

Maybe it would come in handy

OZApps · January 2013

@Zoolax,
I love your art, I hope I that I could use some of that (i.e collaborate)

in your signature, you might want to fix the link of your personal site, it reads as .ocm

john26 · January 2013

I'm intrigued by the Gideros "|D|data.txt" paradigm. How does this work? Does Gideros go through each string replacing |D| with the appropriate path? I use it like this (eg)

fh=io.open("|D|level"..level..".txt","w")

but io.open is part of lua and not Gideros specific. But it still gets it right...

atilim · January 2013

@john26, we've modified the Lua code (io.open, os.rename, etc) so that all file operations are passing through a virtual file system (which handles the |R|, |D|, |T| transformations, loading a file inside an .apk file, etc)

john26 · January 2013

Thanks atilim, very interesting! It seems it would have been simpler to just give user a "getPath" function to call... (just curious...)

atilim · January 2013

@john26 - "getPath" works when you have a real file system available. For example, this is not the case on Android (resource files are inside of a single .apk file). Or on Android it's possible to have an expansion file besides the .apk file. Loading through a virtual file system helps me handle these cases smoothly.

zoolax · January 2013

@ar2rsawseen
Thanks,that will come handy:)

@OZApps
We might can work something out,if you like to have a chat about it my skype name is bdbros

@atilim
Thanks for extra info,and your hard work.

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