Re: reg exp help

On 6/28/05, Jeff 'japhy' Pinyan <japhy@xxxxxxxxxxxx> wrote:
> On Jun 28, DBSMITH@xxxxxxxxxxxxxx said:
>
> > but here is another piece of code I tried and this worked as well
> > considering the attachment:
> >
> > comments on the below block?
> [snip]
> > if (m/begin pgp public key block/ig) {
> > $lc=1;
> > }
> > if ( $lc==1){
> > print $_;
> > }
> > if (m/end pgp public key block/ig) {
> > $lc=0;
> > }
>
> What comment do you want? This is 100% identical to using a flip-flop,
> except that you have an explicit variable holding the truth value. It
> starts as false. If the first regex matches, then $lc is true. If $lc is
> true, print the current line. If the second regex matches, then $lc is
> false.
>
> Identical. Use a flip-flop. It's easier.
>
> --

Not quite. In this code, $lc is not set to zero until after the test
for $lc == 1, so the "-----END.+" line will be printed. A flip-flop on
the other hand--which you have now recommended at least twice--does
exactly what he's looking for.

-- jay
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