prel doubt

[rajesh]

what is the meaning of


LINE:

for(;{
statements;
last LINE if $foo;
next LINE if /^#/;
statemetns;
}

my doubt is what is this /^#/ represents?

I will be so thankful for clearing my doubt
SIva Rajesh

 

[Brian Wakem]

what is the meaning of


LINE:

for(;{
statements;
last LINE if $foo;
next LINE if /^#/;
statemetns;
}

my doubt is what is this /^#/ represents?

I will be so thankful for clearing my doubt
SIva Rajesh

It skips comments.

More precisely, if $_ begins with #, the current iteration of the loop is
ended and the next iteration of the loop begins.

 

[Jürgen Exner]

what is the meaning of

It is a poorly written loop

LINE:

for(;{
statements;
last LINE if $foo;
next LINE if /^#/;

Using last and next as the only loop control is very bad style. I agree they
come in handy for handling special exceptions, but normally a reader should
be able to tell the exit condition by looking at the loop control condition.

statemetns;
}

my doubt is what is this /^#/ represents?

This is a very common Perl idiom. It tries to match $_ against the regular
expression ^#, i.e. checks if a line begins with the hashmark character (or
pound sign or Santa Fu or whatever you want to call it).

For details see
perldoc perlre
perldoc perlop, section "Quote and quote-like operators"

jue

 

[John Bokma]

Using last and next as the only loop control is very bad style.

According to?