Tag: Programming

There is an easier way to get last element on a split operation, save split result to an array and use $array[-1] and this will access last element of the arrays. Example $strings=”foo,bar,test”; my @fields = split(/,/, $strings); print $fields[-1] ;  # the last str in $strings

This note is for a trick to use Q and E  to escape characters for regular expression. You will find it very useful when you do string substitution and your pattern contains characters like slashes or backslashes .

This note is for a trick to use Q and E  to escape characters for regular expression. You will find it very useful when you do string substitution and your pattern contains characters like slashes or backslashes .

Say you have a directory d:bin and you want to add it to path environment at the beginning of your Perl script. Following code will do the trick. my $dir="d:\bin"; $ENV{PATH}.=";$dir"; Then $dir will be included in new $ENV{PATH}

In Perl, you can execute external commands using system() or “. However, system and “ does not redirect command output to console and this results people who runs your perl script can’t see it. This also make debug much harder. Perl does not have a build in switch that equals to batch scripts’ “@echo on”,…