comment on

the 'g' means global. without it only the first 'fred' or 'barney' would be changed.
the 'i' means ignorecase. without it the regexp would not match 'Fred' or 'BaRnEy', with it it does.
the '$1' means whatever was matched by the first set of '()', in this case it could be 'badmatchfred' or 'fredom' or 'Barneycorn' or ...

join is handy because if you wanted to change the seperator on the fly:

join $sep, $one, $two, $three;
[download]

is less typing than

"$one$sep$two$sep$three";  # well in the long run anyway =P
[download]

please don't go worrying yourself about efficiency for at least a couple of months or your head will start to explode when you start map'ing and sort'ing and writing code like
```
sub this { "This" }
sub that { "That" }
[download]
```
for perfectly good reasons.

In reply to Re: Learning Perl 3 questions (misc) by zengargoyle
in thread Learning Perl 3 questions (misc) by sulfericacid

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