Re^2: Is an empty block not a block?

But if so, why is a semicolon necessary. It isn't if the hashref isn't empty as in:

{blah, "blah"}
print "This is fine\n";
[download]

I don't see why being empty changes anything essential.
Perhaps in the empty case, perl doesn't know what it is, and that's the problem...
(I guess {blah, "blah"} is considered to be a hashref; I don't know what else it would be...)
chas

Comment on Re^2: Is an empty block not a block? Select or Download Code

Replies are listed 'Best First'.
Re^3: Is an empty block not a block? by eric256 (Parson) on Nov 18, 2005 at 23:00 UTC
Actualy `{blah, "blah"}` is considered a block. See below for proof. ;). Perl is trying to be smart and guessing on what exactly {} is based on context. {} makes lots of since as a hash ref but very little as a block. `{blah, "blah"}`is usefull as a block while `my $x = {blah, "blah"};` is most probalby a hashref and treated that way. `C:\Perl\test>perl -e"{test,'blah'} print 'hello'"; hello C:\Perl\test>perl -e"{test,'blah', print '1'} print 'hello'"; 1hello` [download] ___________ Eric Hodges $_='y==QAe=e?y==QG@>@?iy==QVq?f?=a@iG?=QQ=Q?9'; s/(.)/ord($1)-50/eigs;tr/6123457/- \/\|\\\_\n/;print;	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^3: Is an empty block not a block?
by eric256 (Parson) on Nov 18, 2005 at 23:00 UTC

Actualy {blah, "blah"} is considered a block. See below for proof. ;). Perl is trying to be smart and guessing on what exactly {} is based on context. {} makes lots of since as a hash ref but very little as a block. {blah, "blah"}is usefull as a block while my $x = {blah, "blah"}; is most probalby a hashref and treated that way.

C:\Perl\test>perl -e"{test,'blah'} print 'hello'";
hello
C:\Perl\test>perl -e"{test,'blah', print '1'} print 'hello'";
1hello
[download]

___________
Eric Hodges $_='y==QAe=e?y==QG@>@?iy==QVq?f?=a@iG?=QQ=Q?9'; s/(.)/ord($1)-50/eigs;tr/6123457/- \/|\\\_\n/;print;

[reply]
[d/l]
[select]