Re^2: Chomp, Concatenation and paths

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Re^3: Chomp, Concatenation and paths by Corion (Patriarch) on Jun 25, 2010 at 17:33 UTC
The anonymous frère likely meant to tell you that the environment is mapped bidirectionally into Perl as the `%ENV` hash. See perlvar about all special Perl variables.	[reply] [d/l]
Re^4: Chomp, Concatenation and paths by Mad_Mac (Beadle) on Jun 25, 2010 at 19:58 UTC
OK, I get it. I could use that instead of a system call. I don't see how that saves me a step, other than maybe I don't need to `chomp`?	[reply] [d/l]
Re^5: Chomp, Concatenation and paths by ikegami (Patriarch) on Jun 25, 2010 at 20:11 UTC
"One step" is quite an understatement. You're spawning a new process (which involves fetching `%ENV`), executing a shell, executing a shell command, checking for errors (or not) and parsing the response in order to get a value Perl already had to begin with. Using `$ENV{localappdata}` saves an incredible number of steps. Also, it doesn't return "Echo is on" if the variable isn't set, and it's portable. Update: Added last paragraph.	[reply] [d/l] [select]
Re^5: Chomp, Concatenation and paths by Corion (Patriarch) on Jun 25, 2010 at 19:59 UTC
`print "$ENV{localappdata}\\someApplication\\";` [download]	[reply] [d/l]
Re^3: Chomp, Concatenation and paths by sierpinski (Chaplain) on Jun 25, 2010 at 19:23 UTC
Print the contents of %ENV, and you'll see exactly what they were talking about. It contains all of your environment variables for whatever shell you're running the script in. Very useful to see what's available to your perl program.	[reply]
Re^4: Chomp, Concatenation and paths by Mad_Mac (Beadle) on Jun 28, 2010 at 09:40 UTC
OK. Sorry for being a little slow. I finally had a few minutes to play around with this. This is definitely a better way to do it. Thanks for the help.	[reply]