I think we're actually on the same page here. In my mind, $color is "this thing" and $_ is e.g. "blue".

But "for" topicalizes. $_ is the topic. $_ is more variable than $color, $_ is the thing.

for (qw/green blue red/) {
    if ($color eq $_) { ... }
}

for each of green, blue and red:
    if the color is it, do something
[download]

for (qw/green blue red/) {
    if ($_ eq $color) { ... }
}

for each of green, blue and red:
    if it is the color, do something
[download]

I read $_ as "the thing" or "it". How do you read $_?

Juerd
- http://juerd.nl/
- spamcollector_perlmonks@juerd.nl (do not use).