Changes between Version 3 and Version 4 of Submitting/TclTk

Timestamp:

Jun 21, 2014, 5:23:21 AM (10 years ago)

Author:

martinl

Comment:

--

Submitting/TclTk

@@ -173 +173 @@
     Expressions via expr command:
     Slow:
+{{{
         set y [expr $a * $x + $b]
+}}}
     Fast:
+{{{
         set y [expr {$a * $x + $b}]
-
+}}}
     Expressions in conditions:
     Slow:
+{{{
         if [...] {...
+}}}
     Fast:
+{{{
         if {[...]} {...
-
+}}}
     Regular expressions:
     Very slow:
+{{{
         regex "x(\[0-9\]+).*not" $string trash number
+}}}
     Fast:
+{{{
         regex {x([0-9]+).*not} $string trash number
-
+}}}
     If you really want speed:
     If a regular expression needs to be constructed from variables but used