Re^2: Regex Optimization Question

Using $1, $2, etc without knowing if the regexp matched is dangerous. For example,

foreach ('foo', 'bar') {
   /(oo)/;
   print("$1\n");
}
[download]

outputs

oo
oo
[download]

Comment on Re^2: Regex Optimization Question Select or Download Code

Replies are listed 'Best First'.
Re^3: Regex Optimization Question by aweeraman (Novice) on Mar 23, 2006 at 20:28 UTC
True. I've found that in these cases, doing the regex with pattern memory in its own code block works. `foreach ('foo', 'bar') { { /(oo)/; print("$1\n"); } }` [download]	[reply] [d/l]
Re^4: Regex Optimization Question by ikegami (Patriarch) on Mar 23, 2006 at 21:54 UTC
I didn't know that. Neat!	[reply]