catch question/error ??

[Ofloo]

Code: Select all

if {[string match -nocase *k* $packet(size)]} {
  catch {[format %.2f [expr [lindex [split [string tolower $packet(size)] k] 0] * 1024.0]]} packet(byte)
} elseif {[string match -nocase *m* $packet(size)]} {
  catch {[format %.2f [expr [lindex [split [string tolower $packet(size)] m] 0] * 1024 * 1024.0]]} packet(byte)
} elseif {[string match -nocase *g* $packet(size)]} {
  catch {[format %.2f [expr [lindex [split [string tolower $packet(size)] g] 0] * 1024 * 1024 * 1024.0]]} packet(byte)
} elseif {[string match -nocase *b* $packet(size)]} {
  catch {[format %.2f [lindex [split [string tolower $packet(size)] b] 0]]} packet(byte)
}
putlog "$packet(byte)"

error: [18:06] <Eggy> [18:06] invalid command name "5368709120.00"

catch script ?varName?

so the last one is setting the varname right ..? ex: catch [expr 1+2] result
putlog $result -- > result = 3 right ??

why then is it giving that error ?

[stdragon]

Because catch executes the code you pass it... if you are calling

catch [expr 1+2] blah

Then tcl first does substitution...

catch 3 blah

Then tcl tries to execute "3", and gets an error. You probably meant:

catch {expr 1+2} blah

[Ofloo]

but why.. how can a variable be executed ?

so how can i prevent it from executing i just wana set something and catch it in case it goes wrong ..

[stdragon]

"expr" is a command, not a variable...

as for your second question, use the code that I showed you already :)

[Ofloo]

sorry ic what u mean .. lol think i understand now tnx