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doc/Plugins/Plang: update karma example

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Pragmatic Software 2020-09-29 19:49:01 -07:00
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@ -11,6 +11,9 @@
* [factset](#factset)
* [factappend](#factappend)
* [userget](#userget)
* [Examples](#examples)
* [Basic examples](#basic-examples)
* [Karma example](#karma-example)
<!-- md-toc-end -->
## About
@ -98,8 +101,46 @@ See the [Plang Map documentation](https://github.com/pragma-/Plang#maps) for a r
### Karma example
This is just a quick-and-dirty placeholder snippet for now. This section will be updated with a proper
and elaborate demonstration of creating proper `karma` commands and triggers.
Here is a quick-and-dirty way to make a simple Karma system.
<pragma-> !plang var karma = Integer(factget('#karma-data', 'pragma-')); karma += 1; factset('#karma-data', 'pragma-', String(karma));
First we `factadd` the `++` command. Note that `$arg[0]` is PBot's special
argument variable representing the first command argument.
<pragma-> !factadd ++ /call plang var karma = Integer(factget('#karma-data', '$arg[0]')); karma += 1; factset('#karma-data', '$arg[0]', String(karma));
<PBot> ++ added to global channel.
Similarly, we add the `--` command.
<pragma-> !factadd -- /call plang var karma = Integer(factget('#karma-data', '$arg[0]')); karma -= 1; factset('#karma-data', '$arg[0]', String(karma));
<PBot> -- added to global channel.
Finally, we add the `karma` command. This command simply displays the Karma value.
<pragma-> !factadd karma /call plang var k = factget('#karma-data' , '$arg[0]'); if k == null then print('No karma for $arg[0] yet.') else print($'Karma for $arg[0]: {k}')
<PBot> karma added to global channel.
A short demonstration:
<pragma-> !karma nf
<PBot> No karma for nf yet.
<pragma-> !-- nf
<PBot> -1
<pragma-> !-- nf
<PBot> -2
<pragma-> !++ nf
<PBot> -1
<pragma-> !karma nf
<PBot> Karma for nf: -1
You can use double quotes to group multiple words as one argument (but not single quotes due to how `$arg[0]` is inserted
into single-quoted strings in the Plang snippets).
<pragma-> !++ "this and that"
<PBot> 1
<pragma-> !karma "this and that"
<PBot> Karma for "this and that": 1