"subst -nobackslashes -nocommands -novariables" ?

Adrenalin · Post by **Adrenalin** » Wed Feb 02, 2005 11:08 am

I trying to figured out what "subst -nobackslashes -nocommands -novariables text" are doing ?

bind ctcp - ACTION action_in
proc action_in {nick uhost hand chan key text} {
subst -nobackslashes -nocommands -novariables text
general_in $nick $uhost $hand $chan $text
}

That must be some protection ? Any example is also welcomed, thanks.

KrzychuG · Post by **KrzychuG** » Wed Feb 02, 2005 11:29 am

http://www.tcl.tk/man/tcl8.4/TclCmd/subst.htm

De Kus · Post by **De Kus** » Wed Feb 02, 2005 11:29 am

PS: lol @KrzychuG, a few sec faster ^-^

PPS: better?

stdragon · Post by **stdragon** » Wed Feb 02, 2005 12:46 pm

I don't think Adrenalin was asking for the man page... more like, what is it DOING? In other words, if you call subst and tell it not to evaluate backslashes, commands, or variables, what is the point? What does it DO? Anybody have an idea? My initial guess is... it does nothing.

Ofloo · Post by **Ofloo** » Wed Feb 02, 2005 2:08 pm

well its like for example to evaluate variables but not execute or execute but not resolve variables and so on .. for example

Code: Select all

set new_test blah
set a new
set b test
puts [subst -nocommands $a_$b]

otherwize it would say $a_ is not a variable !

i used it to create dynamic array names.

name_Array(something) data

ex:
set $nick_$chan($host) "+o"

could be done more efficient but just to give you an idea..

Ofloo · Post by **Ofloo** » Wed Feb 02, 2005 2:13 pm

De Kus wrote:RTFM
http://www.tcl.tk/man/tcl8.5/TclCmd/subst.htm

PS: lol @KrzychuG, a few sec faster ^-^

i think mentioning the manual once would be sufficient

stdragon · Post by **stdragon** » Wed Feb 02, 2005 2:26 pm

Ofloo, the posted code uses -nocommands -novariables -nobackslashes all at once.

If it only used one of them, then yeah, it would have a point.. but all 3?

Ofloo · Post by **Ofloo** » Wed Feb 02, 2005 6:08 pm

hehe sorry didn't notice he used all 3 of em

Alchera · Post by **Alchera** » Wed Feb 02, 2005 7:10 pm

A rough guess would be that the piece of code Adrenalin posted is from some sort of channel protection script and is used for excessive "away" messages in the channel and the use of -nocommands -novariables -nobackslashes could be to get around the varied weird and wonderfull messages that are created these days (along with equally weird and wonderfull nicks) all using characters that eggdrop most of the time chokes on.

Post by **user** » Wed Feb 02, 2005 7:39 pm

It does nothing but waste some cpu. The string "text" doesn't contain any characters that would trigger substitutions, and the return value (text) is discarded. The author is either stupid or trying to confuse you.

^DooM^ · Post by **^DooM^** » Wed Feb 02, 2005 7:51 pm

Dont hold back user you just tell it as you see it..

Alchera · Post by **Alchera** » Wed Feb 02, 2005 8:24 pm

^DooM^ wrote:Dont hold back user you just tell it as you see it..

LOL .. well there went my nice little theory out the window.

Ofloo · Post by **Ofloo** » Thu Feb 03, 2005 4:09 am

i think he just forgot a '$' infront of the word text

Post by **user** » Thu Feb 03, 2005 8:33 am

Ofloo wrote:i think he just forgot a '$' infront of the word text

It would still do nothing. (subst doesn't modify variables...it returns the string fed to it with substitutions performed (none if all the switches are used))

Ofloo · Post by **Ofloo** » Thu Feb 03, 2005 12:37 pm

i know, but i don't think it was the intention of using them all i think he is learning tcl and trying to find out the use of the command