Re^2: Group by from array

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Re^3: Group by from array by choroba (Cardinal) on Sep 01, 2022 at 14:16 UTC
It's also slower. `map{substr$_->[0],$_->[1]\|\|0,1}[\\|\|{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^ARGV,3]`	[reply] [d/l]
Re^3: Group by from array by sroux (Sexton) on Sep 02, 2022 at 08:12 UTC
Thank you both for your contribution, indeed if I can avoid using a specific module that could be much better. This is what I tried below without success yet considering the following result: `{ " " => { Feb => 0, Jan => 0, Mar => 0 } }` @mapped = ("Account Entity Unit Jan Feb Mar", "Account01 Entity01 Unit01 1 2 3", "Account01 Entity01 Unit01 4 5 6", "Account01 Entity01 Unit01 7 8 9", "Account02 Entity02 Unit02 10 11 12"); my %group_by; my @titles = split ' ', @mapped; foreach (@mapped) { #print $_."\n"; my @parts = split; #print @parts."\n"; my %hash; @hash{ @titles } = @parts; #don't get it for(qw(Jan Feb Mar)){ $group_by{join ' ', @hash{qw(Account Entity Unit)}}{ $_ } +=+ +$hash{ $_ }; #don't get it either } } use Data::Dump 'dd'; dd \%group_by; [download]	[reply] [d/l] [select]
Re^4: Group by from array by tybalt89 (Monsignor) on Sep 02, 2022 at 08:25 UTC
Just some small tweaks to make it work. #!/usr/bin/perl use strict; # https://perlmonks.org/?node_id=11146593 use warnings; my @mapped = ("Account Entity Unit Jan Feb Mar", "Account01 Entity01 Unit01 1 2 3", "Account01 Entity01 Unit01 4 5 6", "Account01 Entity01 Unit01 7 8 9", "Account02 Entity02 Unit02 10 11 12"); my %group_by; my @titles = split ' ', shift @mapped; foreach (@mapped) { my %hash; @hash{ @titles } = split; #don't get it NOTE makes a h +ash with titles as keys and fields of current line as values for(qw(Jan Feb Mar)){ $group_by{join ' ', @hash{qw(Account Entity Unit)}}{ $_ } += $ +hash{ $_ }; #don't get it either NOTE does the SUM function that y +our SQL is doing } } use Data::Dump 'dd'; dd \%group_by; [download] Outputs: `{ "Account01 Entity01 Unit01" => { Feb => 15, Jan => 12, Mar => 18 }, "Account02 Entity02 Unit02" => { Feb => 11, Jan => 10, Mar => 12 }, }` [download]	[reply] [d/l] [select]
Re^5: Group by from array by tybalt89 (Monsignor) on Sep 02, 2022 at 09:06 UTC
Same with "nicer" printout. #!/usr/bin/perl use strict; # https://perlmonks.org/?node_id=11146593 use warnings; my @copy = my @mapped = ("Account Entity Unit Jan Feb Mar", "Account01 Entity01 Unit01 1 2 3", "Account01 Entity01 Unit01 4 5 6", "Account01 Entity01 Unit01 7 8 9", "Account02 Entity02 Unit02 10 11 12"); my %group_by; my @titles = split ' ', shift @mapped; foreach (@mapped) { my %hash; @hash{ @titles } = split; #don't get it NOTE makes a h +ash with titles as keys and fields of current line as values for(qw(Jan Feb Mar)){ $group_by{join ' ', @hash{qw(Account Entity Unit)}}{ $_ } += $ +hash{ $_ }; #don't get it either NOTE does the SUM function that y +our SQL is doing } } #use Data::Dump 'dd'; dd \%group_by; # if you want a "nice" printout open my $incolumns, '\|-', 'column -t' or die; print $incolumns "$copy[0]\n", "$copy[0]\n" =~ s/\w/-/gr; # separator +line foreach( sort keys %group_by ) { print $incolumns "$_ @{ $group_by{ $_ } }{qw(Jan Feb Mar)}\n"; } close $incolumns; [download] Outputs: `Account Entity Unit Jan Feb Mar ------- ------ ---- --- --- --- Account01 Entity01 Unit01 12 15 18 Account02 Entity02 Unit02 10 11 12` [download]	[reply] [d/l] [select]
Re^6: Group by from array by LanX (Saint) on Sep 02, 2022 at 10:34 UTC
Re^4: Group by from array by LanX (Saint) on Sep 02, 2022 at 10:42 UTC
> `@hash{ @titles } = @parts; #don't get it` That's a Hash Slice Here a little compilation with more usage examples I found in a blog: Perl 5: Hash slices can replace loops NB: the `my %hash;` doesn't need to be in the same line!!! Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply] [d/l] [select]