Re^2: global $_ behavior

$_ is not block scoped; it's just an ordinary global variable that happens to be the default target for various operations.

Thank you for this clear statement. I have been trapped by the globalness of $_ myself some times - it just feels quite natural for the beginner to assume that implicit assignment to $_ should also scope $_ implicitly to the assigning block.
Well, it does not unless you make it explicitly local.
I guess there are many good reasons for this :)

Comment on Re^2: global $_ behavior

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Re^3: global $_ behavior by TimToady (Parson) on Dec 02, 2005 at 16:17 UTC
There aren't really many good reasons for `$_` to be global, and the main reason it's that way is simply that when Perl started out, all variables were globals. So Perl 6 is changing `$_` to be implicitly lexically scoped to each sub. For those rare occasions where a sub wants to look at the `$_` of its caller, it can use `CALLER::<$_>` to do that.	[reply]