Zugg Software :: View topic - What is %-1?

Beginner Joined: 19 Jun 2007 Posts: 23

I'm trying to study some old scripts, but I can't figure out the %-1 here. Is there a meaning to this that I don't know about? It would help me a bunch :) Thanks!

#if (%numitems(@todo_list) > 0) {todo_list = %concat(@todo_list, "|%-1")} {todo_list = "%-1";#if (%numitems(@todo_list) + %numitems(@todo_free) == %numitems(%-1)) {i_scan_todo}}

Posted: Fri May 15, 2009 11:01 pm

The minus sign in front means to fetch all arguments starting with the first one. For example, if you had an alias called "test" and you called it with:

test this is a test

then you get the following variables:

%1 = this
%2 = is
%3 = a
%4 = test
%-1 = this is a test
%-2 = is a test
%-3 = a test
%-4 = test

Now, in CMUD, there is also the %param and %params functions. %param(n) is equal to %n and %params(n) is equal to %-n. So using %params(1) would be the proper new syntax to use instead of "%-1".

The other problem is with the "%-1" syntax. The " double quotes prevent any variables from being parsed within them (which is a change from zMUD). So the %-1 isn't going to be expanded...the "" cause CMUD to treat it as a literal string value.

So your completed and updated script would be:

Posted: Fri May 15, 2009 11:06 pm

Edit: Ninja'd (noticed quite a bit later, apparently).

%-1 means take the first parameter and everything after it. %-2 would be take the second parameter and everything after that, and so forth.

For instance, say that I had a command like:

showitem channelname itemnumber message I want to send

where showitem was the alias. I might set it up like this:

#ALIAS showitem {#EXEC %concat(%1, %-3," Item: ",%2)}

It's a contrite example, but here's how it would work:

showitem barter 3 Hi! This is my message! --> barter Hi! This is my message! Item: 3

To break down parameters:
showitem (param1)barter (param2)3 (param3)Hi! (param4)This (param5)is (param6)my (param7)message![/code]

So, %-1 would be "barter 3 Hi! This is my message!"
%-2 would be "3 Hi! This is my message!"
%-3 would be "Hi! This is my message!"

and so forth.

Hope that helps. Might have been more information than you were looking for, though.

Charneus

Beginner Joined: 19 Jun 2007 Posts: 23

Thanks, that DOES help!

Posted: Sat May 16, 2009 12:46 pm

Nice explanation Zugg, always sorta wondered what that does,
for some reason when it's explained that way I get it heh.

Beginner Joined: 19 Jun 2007 Posts: 23

I assume that affects everything, so I'll have to change:

#priority {temp_list = %null;#forall {%-1} {#if (!%ismember("%i", @todo_list)) {#additem temp_list {%i}}};#if (!%null(@temp_list)) {do @temp_list}}

to:

#priority {temp_list = %null;#forall {%-1} {#if (!%ismember(%i, @todo_list)) {#additem temp_list {%i}}};#if (!%null(@temp_list)) {do @temp_list}}

right? Looking through the documentation I'm pretty darn sure, so nevermind :)

Posted: Sun May 17, 2009 1:50 am

Yup. "string" in CMUD is unambiguously a literal string, and will appear exactly as you typed it, no matter what special characters it contains.

Beginner Joined: 19 Jun 2007 Posts: 23

Thanks! Alright, another question: @dbname.keys doesn't seem to do what it might have in ZMud. Pointers?

Edit: or maybe it was replaced with %dbkeys(dbname). :)

Posted: Sun May 17, 2009 4:15 am

@dbname.keys was never a thing as far as I can remember. %dbkeys is new and returns a list of the keys in a variable. @dbname.keyname still returns the value of a key provided it's not no special characters in it; %db(@dbname,"keyname") picks up there, same as always.

Beginner Joined: 19 Jun 2007 Posts: 23