Concat a String

[Scott Penrose]

Hey Dudes,

I find that we have a lot of code that loops through code continually 
building a XML object or some HTML or some other type of string by 
continuing to concatenate a string.

eg:
	foreach my $x (@y) {
		$out .= $x->{something} . "\n";
	}

(the example above is too trivial to be real, coz you could just use a 
map there !)

Anyway I was wondering if we should be doing something much more 
sensible, along the lines of

	foreach my $x (@y) {
		push @z, $x->{something};
	}
	$out = join("\n", @z);

Or we could even go a lot further and do it without temporary variables.

	$out = join("\n",
		map {
			$_->{something}
		} @y
	);

(oooh I am looking forward to Perl 6, where I don't have to use $_ for 
the map above :-)

Which is more efficient but still logical to read ?

Also if I go about the join/map code above, do you think it is 
reasonable to have a very complicated MAP method, or is that just too 
hard to read/understand ?

Scott
-- 
Scott Penrose
Anthropomorphic Personification Expert
http://search.cpan.org/search?author=SCOTT
scott at cpan.org

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