1 package SL::MoreCommon;
4 our @ISA = qw(Exporter);
6 our @EXPORT = qw(save_form restore_form compare_numbers any cross);
7 our @EXPORT_OK = qw(ary_union ary_intersect ary_diff listify ary_to_hash);
9 use List::MoreUtils qw(zip);
17 $main::lxdebug->enter_sub();
19 my @dont_dump_keys = @_;
20 my %not_dumped_values;
22 foreach my $key (@dont_dump_keys) {
23 $not_dumped_values{$key} = $main::form->{$key};
24 delete $main::form->{$key};
27 my $old_form = YAML::Dump($main::form);
28 $old_form =~ s|!|!:|g;
29 $old_form =~ s|\n|!n|g;
30 $old_form =~ s|\r|!r|g;
32 map { $main::form->{$_} = $not_dumped_values{$_} } keys %not_dumped_values;
34 $main::lxdebug->leave_sub();
40 $main::lxdebug->enter_sub();
42 my ($old_form, $no_delete, @keep_vars) = @_;
44 my $form = $main::form;
45 my %keep_vars_map = map { $_ => 1 } @keep_vars;
47 map { delete $form->{$_} if (!$keep_vars_map{$_}); } keys %{$form} unless ($no_delete);
49 $old_form =~ s|!r|\r|g;
50 $old_form =~ s|!n|\n|g;
51 $old_form =~ s|![!:]|!|g;
53 my $new_form = YAML::Load($old_form);
54 map { $form->{$_} = $new_form->{$_} if (!$keep_vars_map{$_}) } keys %{ $new_form };
56 $main::lxdebug->leave_sub();
60 $main::lxdebug->enter_sub();
67 $main::all_units ||= AM->retrieve_units(\%main::myconfig, $main::form);
68 my $units = $main::all_units;
70 if (!$units->{$a_unit} || !$units->{$b_unit} || ($units->{$a_unit}->{base_unit} ne $units->{$b_unit}->{base_unit})) {
71 $main::lxdebug->leave_sub();
75 $a *= $units->{$a_unit}->{factor};
76 $b *= $units->{$b_unit}->{factor};
78 $main::lxdebug->leave_sub();
95 local (*A, *B) = @_; # syms for caller's input arrays
98 my ($caller_a, $caller_b) = do {
101 \*{$pkg.'::a'}, \*{$pkg.'::b'};
104 local(*$caller_a, *$caller_b);
106 # This map expression is also the return value.
107 map { my $a_index = $_;
108 map { my $b_index = $_;
109 # assign to $a, $b as refs to caller's array elements
110 (*$caller_a, *$caller_b) = \($A[$a_index], $B[$b_index]);
111 $op->(); # perform the transformation
116 sub _ary_calc_union_intersect {
121 foreach my $e (@$a, @$b) { $count{$e}++ }
125 foreach my $e (keys %count) {
127 push @isect, $e if $count{$e} == 2;
130 return (\@union, \@isect);
134 return @{ (_ary_calc_union_intersect @_)[0] };
138 return @{ (_ary_calc_union_intersect @_)[1] };
143 my %in_b = map { $_ => 1 } @$b;
144 return grep { !$in_b{$_} } @$a;
148 my @ary = scalar @_ > 1 ? @_ : ref $_[0] eq 'ARRAY' ? @{ $_[0] } : (@_);
149 return wantarray ? @ary : scalar @ary;
154 my $value_key = shift;
156 return map { ($_, 1) } @_ if !defined($idx_key);
158 my @indexes = map { ref $_ eq 'HASH' ? $_->{ $idx_key } : $_->$idx_key(); } @_;
160 !defined($value_key) ? $_
161 : ref $_ eq 'HASH' ? $_->{ $value_key }
165 return zip(@indexes, @values);
174 SL::MoreCommon.pm - helper functions
178 this is a collection of helper functions used in Lx-Office.
179 Most of them are either obvious or too obscure to care about unless you really have to.
180 The exceptions are documented here.
189 A lot of the old sql-ledger routines are strictly procedural. They search for params in the $form object, do stuff with it, and return a status code.
191 Once in a while you'll want something from such a function without altering $form. Yeah, you could rewrite the routine from scratch... not. Just save you form, execute the routine, grab your results, and restore the previous form while you curse at the original design.
193 =item cross BLOCK ARRAY ARRAY
195 Evaluates BLOCK for each combination of elements in ARRAY1 and ARRAY2
196 and returns a new list consisting of BLOCK's return values.
197 The two elements are set to $a and $b.
198 Note that those two are aliases to the original value so changing them
199 will modify the input arrays.
201 # append each to each
204 @x = cross { "$a$b" } @a, @b;
205 # returns a1, a2, a3, b1, b2, b3, c1, c2, c3
207 As cross expects an array but returns a list it is not directly chainable
208 at the moment. This will be corrected in the future.
210 =item ary_to_hash INDEX_KEY, VALUE_KEY, ARRAY
212 Returns a hash with the content of ARRAY based on the values of
213 INDEX_KEY and VALUE_KEY.
215 If INDEX_KEY is undefined then the elements of ARRAY are the keys and
216 '1' is the value for each of them.
218 If INDEX_KEY is defined then each element of ARRAY is checked whether
219 or not it is a hash. If it is then its element at the position
220 INDEX_KEY will be the resulting hash element's key. Otherwise the
221 element is assumed to be a blessed reference, and its INDEX_KEY
222 function will be called.
224 The values of the resulting hash follow a similar pattern. If
225 VALUE_KEY is undefined then the current element itself is the new hash
226 element's value. If the current element is a hash then its element at
227 the position VALUE_KEY will be the resulting hash element's
228 key. Otherwise the element is assumed to be a blessed reference, and
229 its VALUE_KEY function will be called.