Reading parts of strings

[Haddood]

hi
I downloaded VC few days go ... since then I can't go to sleep  ... I build in 3 days what i was planing to build in 3 years 
the software is just magic ... using it with kinect and the response pretty good till now ...

I am wondering how can I read parts of strings ... lets say I Have "A01BF"

I need to read the first character ... then the 4th and 5th ...

thanks

[Kalle]

Hi Haddood and welcome to VC-Forum. Nice to hear that you have fun with VoxCommando 

Please give us more details in what you plan to do when you say "... how can I read parts of strings ..." - which strings do you mean? Is the string a result from a command?

Anyway, there are many possibilities.

[Haddood]

Hi kalle,
yes the string is a result from a command ...  in fact it is the status feedback of insteon devices ... I managed to cut it down to 5 characters only using result.replace. That was kind of easy as there is clear patterns ... now I need to read the last 2 characters that will give if the device is on, off or dim level ...

ex "B10FF" is fully on as FF is the level (Hex)

[jitterjames]

Ahhh the old RegEx game.  Who wants to play?  

There are 2 (probably more) ways to handle the goal of capturing the last 2 characters of a string.  You can either use Results.RegEx (preferred) or Results.RegExReplace.

(edited this, got it backwards the first time!)
With Results.RegEx you end up with your 2 chars in {Match.1}
With Results.RegExReplace you end up with your 2 chars in {LastResult}

Here is the xml showing both ways.

Some additional notes:
1 - I am using Results.SetLastResult at the beginning to simulate whatever you would be getting back form your device
2 - While I am at it, this seems like a good way to show how we can use a simple Python action to convert Hex values (from 00 to FF) into a percentage.  If you want to do this you will need to first make sure that the Python plugin is enabled.

Code Select Expand

<?xml version="1.0" encoding="utf-16"?>
<!--VoxCommando 1.9.1.8-->
<commandGroup open="True" name="last 2 chars" enabled="True" prefix="" priority="0" requiredProcess="" description="">
 <command id="277" name="last2chars using RegExReplace" enabled="true" alwaysOn="False" confirm="False" requiredConfidence="0" loop="False" loopDelay="0" loopMax="0" description="">
   <action>
     <cmdType>Results.SetLastResult</cmdType>
     <params>
       <param>thang thank doodad stuff B109F</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
   <action>
     <cmdType>Results.RegEx</cmdType>
     <params>
       <param>(..)$</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
   <action>
     <cmdType>PY.ExecString</cmdType>
     <params>
       <param>result = round(0x{Match.1}/2.55,0)</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
   <action>
     <cmdType>OSD.ShowText</cmdType>
     <params>
       <param>Level is: {LastResult} percent.</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
 </command>
 <command id="290" name="last2chars using RegExReplace" enabled="true" alwaysOn="False" confirm="False" requiredConfidence="0" loop="False" loopDelay="0" loopMax="0" description="">
   <action>
     <cmdType>Results.SetLastResult</cmdType>
     <params>
       <param>thang thank doodad stuff B109F</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
   <action>
     <cmdType>Results.RegExReplace</cmdType>
     <params>
       <param>.*(..)$</param>
       <param>$1</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
   <action>
     <cmdType>PY.ExecString</cmdType>
     <params>
       <param>result = round(0x{LastResult}/2.55,0)</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
   <action>
     <cmdType>OSD.ShowText</cmdType>
     <params>
       <param>Level is: {LastResult} percent.</param>
     </params>
     <cmdRepeat>1</cmdRepeat>
   </action>
 </command>
</commandGroup>

http://voxcommando.com/mediawiki/index.php?title=XML_on_the_forum

[Haddood]

Sweet ....
Another couple of questions:
1. where I can learn about those patern , what if I wanted to extract the 7th character out of 20 characters long string?
2. I tried to convert to hex from decimal using python int( decimal var, 16). And it did not work

Just a note abt my programming experience... I used vb, autolisp, lua scripting ... So python is a bit strange for me

[jitterjames]

Sweet ....
Another couple of questions:
1. where I can learn about those patern , what if I wanted to extract the 7th character out of 20 characters long string?
2. I tried to convert to hex from decimal using python int( decimal var, 16). And it did not work

Just a note abt my programming experience... I used vb, autolisp, lua scripting ... So python is a bit strange for me

1 - http://voxcommando.com/mediawiki/index.php?title=Actions#RegEx
2 - I would need to know in more detail what you actually did in order to assist.  The example I posted successfully converts a hex number to decimal.  As far as different programming languages go, to me they are all about the same.  I can't remember any of them properly and generally have to rely on web searches for most things to refresh my memory.

[Kalle]

2. I tried to convert to hex from decimal using python int( decimal var, 16). And it did not work

https://www.google.de/search?q=python+convert+decimal+to+hex+string

[Haddood]

Thank you guys ... it is done