egghelp/eggheads community

Substituting character strings for text

2002-04-01T15:40:00-04:00

Ahh, thanks egghead, gave me some ideas I havent used the switch command yet so I'm still reading through your example, but it has me thinking. I had a "writers block" on this one

Statistics: Posted by Guest — Mon Apr 01, 2002 3:40 pm

Substituting character strings for text

2002-04-01T13:55:00-04:00

There are various ways: for example, split the string around *, and review each item of the list while keeping track of the number of {} in the list. Or split the string into a list of single characters and review each character.
Another way is to scan out substrings with and without *'s and upon each scan remove the scanned substring from the string. See below.

Code:

#---------------------------------------------------------------------# countstars# On input a string, returns a string with the ***'s replaced by# <# stars>#---------------------------------------------------------------------proc countstars { string } {   set newstring {}   while { $string != "" } {      # substring without stars?      if {[scan $string {%[^*]} substring] == 1 } {          append newstring $substring         set sublength [string length $substring]         set string [string range $string $sublength end]      }      # substring with stars?      if {[scan $string {%[*]} substring] == 1 } {         set starcount [string length $substring]         switch -- $starcount {            1 { append newstring "<1 star>" }            default { append newstring "<$starcount stars>" }         }         set string [string range $string $starcount end]      }   }   return $newstring}# for testing purposes onlyset string {This hotel has *****, but it is not even worth * or **}puts "B: $string!"puts "A: [countstars $string]!"

[ This Message was edited by: egghead on 2002-04-01 11:00 ]

Statistics: Posted by egghead — Mon Apr 01, 2002 1:55 pm

Substituting character strings for text

2002-03-31T14:31:00-04:00

Here's a bit of a curly one I'm having trouble getting my head around. Say I have a string like this: "blah1***blah2****"

I want to convert it to a string as follows:
"blah1<3 stars>blah2<4stars>"

Anyone got any thoughts on how I'd do it? There could be anywhere from 1 to 100 stars in any given block. Without going into the semantics of why I need to do it, it's not a proposition to just order the data differently. I need to be able to make a conversion as outlined.

Statistics: Posted by Guest — Sun Mar 31, 2002 2:31 pm