>> "if.then.else" <[EMAIL PROTECTED]> writes:
> > print "$windmill[$_ & 3]\r" and usleep(50) for 0..10000;
>
> i'm a bit confussed with this print statement.
0..10000 is a range from 0 to 10000. (perlop(1), Range Operators)
for (foreach) is a modifier for the statement preceding it (perlsyn(1),
Simple statements)
and is the more readable form of &&, the logical and (perlop(1),
Logical And)
print you know, usleep is simple a function that sleeps for so many
microseconds
$foo[...] is the array you already know probably.
& is the bitwise and (perlop(1), Bitwise operators)
$_ comes from the "for". foreach iterates over the list and assigns
each element to the variable you provide, or $_ if you don't provide
any. (perlvar(1), $ARG or $_)
foreach my $i (0..10000) {
print "$windmill[$_ & 3]\r";
usleep(50);
}
does the same.
for($i=0; $i <= 10000; $i++) {
print "$windmill[$_ & 3]\r";
usleep(50);
}
would be the C programmer's version.
last but not least, "$_ & 3" is the same as $_ % 4
--
Marcelo
