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doc/Factoids.md: document new expansion modifiers

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Pragmatic Software 2020-06-01 17:11:48 -07:00
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doc/Factoids.md
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@ -340,8 +340,10 @@ You can use the following variables in a factoid or, in some cases, as an argume
`$0` expands to the original keyword used to invoke a factoid. `$0` expands to the original keyword used to invoke a factoid.
## List variables ## List variables
You may create a factoid containing a list of quoted values. When this factoid is used as a `$variable` a random value You may create a factoid containing a list of values. Each value can optionally be quoted to preserve spaces within.
will be selected from the list.
When this factoid is used as a `$variable` a random value will be selected from the list. You can further control
which or how many values are chosen via [expansion modifiers](#expansion-modifiers).
For example, first create a normal factoid. For example, first create a normal factoid.
@ -379,7 +381,26 @@ Another example, creating the RTFM trigger:
* PBot thwacks mauke with a big red manual. * PBot thwacks mauke with a big red manual.
### Expansion modifiers ### Expansion modifiers
Factoid `$variables` can accept trailing expansion modifier keywords prefixed with a colon. These can be chained together to combine their effects. List `$variables` can accept trailing expansion modifier keywords prefixed with a colon. These can be chained together to combine their effects.
There are two categories of expansion modifiers. Selection modifiers and text modifiers.
Selection modifiers control how values are chosen from the `$variable`'s list.
<pragma-> !echo $colors:pick(3)
<PBot> red pink green
Note that modifiers may not contain spaces. `:pick(2, 3)` is invalid and must be written as `:pick(2,3)`.
Modifier | Description
--- | ---
`:<channel>` | Looks for variable in `<channel>` first; use `global` to refer to the global channel. This modifier must be the first modifier when chained with other modifiers.
`:index(n)` | Selects the `n`th element from the `$variable` list.
`:pick(x)` | Selects `x` count of random elements.
`:pick(x,y)` | Selects between `x` and `y`, inclusive, count of random elements.
`:pick_unique(x,y)` | Selects between `x` and `y`, inclusive, count of random elements without any repeated selections.
Text modifiers alter the selected values.
<pragma-> !echo $colors:uc <pragma-> !echo $colors:uc
<PBot> RED <PBot> RED
@ -389,11 +410,25 @@ Factoid `$variables` can accept trailing expansion modifier keywords prefixed wi
Modifier | Description Modifier | Description
--- | --- --- | ---
`:uc` | Uppercases the expansion `:uc` | Uppercases the expansion.
`:lc` | Lowercases the expansion `:lc` | Lowercases the expansion.
`:ucfirst` | Uppercases the first letter in the expansion `:ucfirst` | Uppercases the first letter in the expansion.
`:title` | Lowercases the expansion and then uppercases the initial letter of each word `:title` | Lowercases the expansion and then uppercases the initial letter of each word.
`:<channel>` | Looks for variable in `<channel>` first; use `global` to refer to the global channel
The following text modifiers apply only to selection modifiers that return more than one selection. Using them otherwise has no effect.
Modifier | Description
--- | ---
`:sort` | Sorts the selected list in ascending order.
`:-sort` | Sorts the selected list in descending order.
`:comma` | Converts a selected list to a comma-separated list.
`:enumerate` | Converts a selected list to a comma-separated list with `and` replacing the final comma.
<pragma-> !echo $colors:pick(5):comma
<PBot> red, yellow, blue, dark purple, orange
<pragma-> !echo $colors:pick(5):enumerate
<PBot> blue, green, pink, orange and yellow
## action_with_args ## action_with_args
You can use the [`factset`](#factset) command to set a special [factoid metadata](#factoid-metadata) key named `action_with_args` to trigger an alternate message if an argument has been supplied. You can use the [`factset`](#factset) command to set a special [factoid metadata](#factoid-metadata) key named `action_with_args` to trigger an alternate message if an argument has been supplied.