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chamenas
Wizard
Joined: 26 Mar 2008
Posts: 1547
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 Posted: Mon Apr 12, 2010 6:17 pm
Custom Functions question
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Can I give my function a default parameter? i.e. entering the parameter is optional, if you don't, then it defaults to the specified default?
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Martaigne
Wanderer
Joined: 05 Jan 2002
Posts: 88
Location: Atlanta, GA
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Posted: Mon Apr 12, 2010 6:50 pm
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The simple solution would probably be to check to see if %1 = "" then act accordingly...
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chamenas
Wizard
Joined: 26 Mar 2008
Posts: 1547
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Posted: Mon Apr 12, 2010 7:55 pm
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Huh? As far as I know, you have to define parameters. I should probably give a bit more info.
Here's the function:
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<func name="formatclan" id="526">
<value>#IF ($_color) {
$_c_color = @clancolor( $_clan)
#SWITCH (%ismember( $_clan, @_clan_list)) {#RETURN "[ "%ansi( $_c_color)$_clan%ansi( reset)" ]"}
($_clan="Shalonesti-k") {#RETURN %ansi( 11)"("%ansi( 3)Shalonesti%ansi( 11)")"%ansi( reset)}
(%ismember( $_clan, @_kingdom_list)) {#RETURN %ansi( 11)"("%ansi( 3)$_clan%ansi( 11)")"%ansi( reset)}
(%ismember( $_clan, @_remort_list)) {#RETURN "( "%ansi( $_c_color)$_clan%ansi( reset)" )"}
($_clan="Retired") {#RETURN %ansi( 3)"("%ansi( $_c_color)$_clan%ansi( 3)")"%ansi( reset)}
}
{#SWITCH (%ismember( $_clan, @_clan_list)) {#RETURN "[ "$_clan" ]"}
($_clan="Shalonesti-k") {#RETURN "(Shalonesti)"}
(%ismember( $_clan, @_kingdom_list)) {#RETURN "("$_clan")"}
(%ismember( $_clan, @_remort_list)) {#RETURN "( "$_clan" )"}
($_clan="Retired") {#RETURN "("$_clan")"}}</value>
<arglist>$_clan, $_color</arglist>
</func>
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The function takes TWO parameters, one is mandatory, and one I would like to be optional. The parameters are:
$_clan, $color
The function can't work without a clan to go to it, and putting a default clan would be silly for the way this function is used. However, color is simply a true false. 9 time out of 10, I want it formatted with color. So, rather than having to type
@formatclan($_clan, 1)
every single time, I would rather it defaults to 1, and I would have to put a 0 there instead if I specifically didn't want color. This is less about amount of typing and more about what I remember to do. The function did not have the color parameter for the longest time, so, I'm used to typing it without that argument. |
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Zugg
MASTER
Joined: 25 Sep 2000
Posts: 23379
Location: Colorado, USA
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Posted: Mon Apr 12, 2010 8:05 pm
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Any arguments that are not provided will default to %null. All arguments are optional. You cannot change the default value. So your script just needs to test to see if an argument is null using the
#IF ($_clan = "") ...
or
#IF (%null($_clan)) ...
syntax
And no, you are not required to define arguments. You can still refer to them by the old %1..%99 notation. That concept of "named arguments" is new to the 2.x version of CMUD and makes scripts more readable. |
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chamenas
Wizard
Joined: 26 Mar 2008
Posts: 1547
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Posted: Mon Apr 12, 2010 8:56 pm
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Ah, thanks Zugg. By the way, have a look at the odd issue post, I think it's a bug!
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