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xy78piwwdhlsearch with []

Posted by mdunk (mdunk), 14 December 2005
My application compares 2 lists of strings using lsearch. This does not work when the string contains [] characters, for example:

   set l1 [list {m1} {m2} {m_[2]_n} {m3}]
   set l2 [list {m1} {m2} {m_[2]_n} {m3} {m4}]
   foreach n [split $l2 " "] {
     set v1 [lsearch $l1 $n]
     if {$v1 < 0} {
         puts "ERROR: cannot find $n in list"
     }      
   }

ERROR: cannot find {m_[2]_n} in list
ERROR: cannot find m4 in list

Does anyone know how to make this work?



Posted by admin (Graham Ellis), 14 December 2005
lsearch defaults to using glob style matching on the pattern - so square brackets, ? and * will cause problems.   Use the -exact option.

This worked for me:

Code:
set l1 [list {m1} {m2} {m_[2]_n} {m3}]
set l2 [list {m1} {m2} {m_[2]_n} {m3} {m4}]
foreach n $l2 {
puts $n
set v1 [lsearch -exact $l1 $n]
if {$v1 < 0} {
puts "ERROR: cannot find $n in list"
}
}


Good question ... had me wondering for a minute!   Welcome to Opentalk.



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