regex question

Can someone spot the error in the syntax of this regex. It replaces "workarea" with "staging"

~ s/.*internet(.*)\/WORKAREA\$iwmount\/internet$1\/STAGING/gi;

Edit: I've solved it - it needed .*/ between workarea and $iwmount.

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Comments

Tbag

In case you didn't know this trick, I thought I'd throw it out there for ya. . .

If you're ever doing a search & replace regex of the form /search/replace/, you can substitute the "/" delimiter with any other character and the parser will automatically know what you mean. This is kinda useful because then you don't need to escape your slashes and your regexes end up looking a lot cleaner.

For example, your original of:


s/.*internet(.*)\/WORKAREA\$iwmount\/internet$1\/STAGING/gi;

Is also acceptable this way:


s#.*internet(.*)/WORKAREA#$iwmount/internet$1/STAGING#gi;

application_session_integrationBF.pdf

nipper

But Tom, escaped backslashes are just soooo much more readable than another delimiter.

Adam Stoller

But Tom, escaped backslashes are just soooo much more readable than another delimiter.

Andy - you need to include smileys - people might take your posts seriously and realize (I mean think) you don't know any better ;-)

as for the code - it can also be written like this:

$**** =~ s{^.*internet(.*)/WORKAREA}
         {$iwmount/internet$1/STAGING}xsmgi;

which, depending on the length of both the pattern and the replacement string - might make it easier to read in the source code.

chris__d

Thanks all for your suggestions (especially the ones on making it more readable) - it ended up being done a bit differently again to accommodate another application which is following the others.

Rather than deploying the staging area, it's now deploying the edition.

s/.*\/(Applications)(.*)\/WORKAREA.*/$iwmount\/$1$2\/EDITION/gi;

With another one following it that determines if it is working on internet or intranet.

nipper

Thanks all for your suggestions (especially the ones on making it more readable)
s/.*\/(Applications)(.*)\/WORKAREA.*/$iwmount\/$1$2\/EDITION/gi;

Obviously you did not pay much attention to the readability part.

s|.*/(Applications)(.*)/WORKAREA.*|$iwmount/$1$2\/EDITION|gi;

I like vertical bars as delimiters. Adam likes curly braces. Something other than slash is important to use for readability

Adam Stoller

Obviously you did not pay much attention to the readability part.

s|.*/(Applications)(.*)/WORKAREA.*|$iwmount/$1$2\/EDITION|gi;

I like vertical bars as delimiters. Adam likes curly braces. Something other than slash is important to use for readability

You missed a backslash before /EDITION ;-)

Actually - I like vertical bars too - but if I'm using compound regex's I have to use something else - and then I tend to favor braces - e.g.:

s{^(.*/)(??:WORKAREA|EDITION)/[^/]+|STAGING).*$}{$iwmount$1/EDITION};