Re^2: Return to original loop

Thanks, I put the DATA contents into an array and it worked perfectly.

One question on the quotemeta bit. The code snippet included:

if ($confLine =~ /ip4-address address="\Q$ip/) {

Should that be

if ($confLine =~ /ip4-address address="\Q$ip\E/) {

Or does it not matter, as the variable was the last thing in the regex? i had to tweak my regex and add a quote at the end, as it was matching incorrectly (i.e. 1.2.3.1 would also match 1.2.3.11, .12, etc.), so have gone with:

if ($confLine =~ /ip4-address address="\Q$ip\E"/) {

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Re^3: Return to original loop
by Athanasius (Archbishop) on Oct 15, 2015 at 15:59 UTC

Hello stroke,

See the section “Escape sequences” in perlre#Regular-Expressions, where \Q is defined as follows:

\Q quote (disable) pattern metacharacters until \E

So you need the \E only when what follows contains metacharacters which are meant to behave as metacharacters. A double quote character " is not a metacharacter, so in this case adding the \E makes no difference.

Nevertheless, it’s probably good practice to add it, to make the regex clearer and to guard against bugs in the event that the regex is extended in the future.