On Fri, Sep 4, 2009 at 04:08, Noah Garrett Wallach<noah-l...@enabled.com> wrote:
>
> Hi there,
>
> is there any way to search for the following text? In some cases the text
> that I am search could be
>
> "one-two-three-"
>
> or sometimes the text could be
>
> "one-two-"
>
> what is a nice easy why to parse the above - quotes not included.
snip
What you are looking for is quantifiers. Quantifiers state how many
times the preceding pattern must match:
if (/^one-two-(?:three-){0,1}$/} {
print "matched\n"
}
In that example the quantifer {0,1} says that the pattern (?:three-)
should be between zero and one times. This is a common enough
quantifier that it has gotten a shortcut:
if (/^one-two-(?:three-)?$/} {
print "matched\n"
}
Other shortcuts are + (for {1,}, i.e. one or more) and * (for {0,},
i.e. zero or more).
--
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.
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