X-Git-Url: http://wagnertech.de/gitweb/gitweb.cgi/mfinanz.git/blobdiff_plain/17b8757975a457334b07c1bb393787c0877e4595..f30b6f52b1684388cebc0878b73c39c6b1040749:/bin/mozilla/common.pl diff --git a/bin/mozilla/common.pl b/bin/mozilla/common.pl index 26fd6456e..1c308dac7 100644 --- a/bin/mozilla/common.pl +++ b/bin/mozilla/common.pl @@ -580,46 +580,4 @@ sub cov_selection_internal { $lxdebug->leave_sub(); } -=item cross BLOCK ARRAY ARRAY - -Evaluates BLOCK for each combination of elements in ARRAY1 and ARRAY2 -and returns a new list consisting of BLOCK's return values. -The two elements are set to $a and $b. -Note that those two are aliases to the original value so changing them -will modify the input arrays. - - # append each to each - @a = qw/a b c/; - @b = qw/1 2 3/; - @x = pairwise { "$a$b" } @a, @b; - # returns a1, a2, a3, b1, b2, b3, c1, c2, c3 - -As cross expects an array but returns a list it is not directly chainable -at the moment. This will be corrected in the future. - -=cut -sub cross(&\@\@) { - my $op = shift; - use vars qw/@A @B/; - local (*A, *B) = @_; # syms for caller's input arrays - - # Localise $a, $b - my ($caller_a, $caller_b) = do { - my $pkg = caller(); - no strict 'refs'; - \*{$pkg.'::a'}, \*{$pkg.'::b'}; - }; - - local(*$caller_a, *$caller_b); - - # This map expression is also the return value. - map { my $a_index = $_; - map { my $b_index = $_; - # assign to $a, $b as refs to caller's array elements - (*$caller_a, *$caller_b) = \($A[$a_index], $B[$b_index]); - $op->(); # perform the transformation - } 0 .. $#B; - } 0 .. $#A; -} - 1;