There's a point where I have problems, thought
Sorry, it is a rather tricky to get into words, but hopefully this code will illustrate the difference between then the
length and the
visibility of a scope
sub foo
{ ## start of visible scope
## $x a lexical var only accessable in the *visible* scope
my $x = "a lexical var";
## $y changed for the *length* of the scope
local $y = "a dynamic var";
print "foo(\$x): $x\n";
print "foo(\$y): $y\n";
bar($y);
} ## end of visible scope
sub bar {
## $x is undefined as it is being referenced outside the
## *visible* scope of foo()
## $y is still changed as the scope of foo() has not
## *exitted* yet
print "bar(\$x): $x\n";
print "bar(\$y): $y\n";
}
$y = "a global var";
foo();
## now foo() has exitted $y reverts to it's original value
print "main(\$y): $y\n";
__output__
foo($x): a lexical var
foo($y): a dynamic var
bar($x):
bar($y): a dynamic var
main($y): a global var
HTH
_________
broquaint
