Hi Richard,
> I was frantically reading about the scope of variables. My background
> is Algol 60 and PLI where a block is a compound statement with local
> declarations. I gather in Perl it's the other way round.
No, I think it's the same as those language, C. Running
$n = 1;
sub foo {
print "b $n\n";
my $n = 2;
print "c $n\n";
for (my $i = 0; $i < 2; $i++) {
print "d $n\n";
if ($i == 0) {
my $n = 3; # Never printed.
} else {
$n = 4; # No my.
}
print "e $n\n";
}
print "f $n\n";
}
print "a $n\n";
foo;
print "g $n\n";
gives
a 1
b 1
c 2
d 2
e 2
d 2
e 4
f 4
g 1
> I hear what you say about C++, but I find it easier than Python.
If that's because you like its types-defined-at-compile-time nature then
Go will appeal.
func main() {
type (
foo int
bar int
)
var (
f foo
b bar
)
f = 42
b = f
}
"cannot use f (type foo) as type bar in assignment".
--
Cheers, Ralph.
https://plus.google.com/+RalphCorderoy
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