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


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

by chas (Priest)

on Nov 18, 2005 at 22:18 UTC ( [id://509980]=note: print w/replies, xml )

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in reply to Re: Is an empty block not a block?
in thread 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";
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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

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

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