head

C<Data::Reshapers::Transpose> package module has data transformation functions over
different data structures coercible to full-arrays.


use Data::Reshapers;
use Data::Reshapers::Transpose;


my @tbl = get-titanic-data(headers => "auto").roll(5);
say Transpose(@tbl);



use Data::Reshapers::Predicates;
use Data::Reshapers::Adapters;

unit module Data::Reshapers::Transpose;

#===========================================================
#| Convert into a pretty table object.
our proto Transpose(|) is export {*}


#-----------------------------------------------------------
multi Transpose(%tbl) {

    my Hash %hash-of-hashes;
    my Positional %hash-of-arrays;

    # Coerces into hash of hashes
    try {
        %hash-of-hashes = %tbl;
    }

    if $! {

        # Coerce into array-of-hashes
        try {
            %hash-of-arrays = %tbl
        }

        if $! {
            fail 'If the first argument is a hash then it is expected that it can be coerced into a hash-of-hashes or a hash-of-positionals.';
        }
    }

    if %hash-of-hashes.defined and %hash-of-hashes {

        my %h-new;
        for %hash-of-hashes.values.first.keys X %hash-of-hashes.keys -> ($new-key, $current-key) {
            %h-new{$new-key}{$current-key} = %hash-of-hashes{$current-key}{$new-key};
        }

        return %h-new;

    } else {

        my Hash @arrNew;
        for ^%hash-of-arrays.values.first.elems X %hash-of-arrays.keys -> ($new-index, $current-key) {
            @arrNew[$new-index]{$current-key} = %hash-of-arrays{$current-key}[$new-index];
        }

        return @arrNew;
    }

    # Result
    return Nil;
}

#-----------------------------------------------------------
multi Transpose(@tbl) {

    my Hash @arr-of-hashes;
    my Positional @arr-of-arrays;

    # Coerce into array-of-hashes
    try {
        @arr-of-hashes = @tbl
    }

    if $! {

        # Coerce into array-of-hashes
        try {
            @arr-of-arrays = @tbl
        }

        if $! {
            # Check for an array of key-array pairs
            if is-array-of-key-array-pairs(@tbl) or is-array-of-key-hash-pairs(@tbl) {

                # Convert an array of key-[array|hash] pairs into a hash of hashes
                my %res = convert-to-hash-of-hashes(@tbl);

                return Transpose(%res)
            }

            fail 'If the first argument is an array then it is expected that it can be coerced into an array-of-hashes or an array-of-positionals.';
        }
    }

    # Convert to table
    if @arr-of-hashes.defined and @arr-of-hashes {

        my Array %thash;
        for @arr-of-hashes[0].keys X ^@arr-of-hashes.elems -> ($new-key, $current-index) {
            %thash{$new-key}[$current-index] = @arr-of-hashes[$current-index]{$new-key};
        }

        return %thash;

    } else {

        my Array @tarr;
        for ^@arr-of-arrays[0].elems X ^@arr-of-arrays.elems -> ($new-index, $current-index) {
            @tarr[$new-index][$current-index] = @arr-of-arrays[$current-index][$new-index];
        }

        return @tarr

    }

    # Result
    return Nil;
}

root

README

ToWideFormat

React

=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>

=item1 B<Resources>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>

=end nested
=begin nested :!nested

=item1 B<Resoures>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=end React


=begin React :component<CookieConsent> :id<CookieConsent> :buttonCaption("Got it!")
=para
This website uses cookies for analytics.
=end React


Transpose

Data::Reshapers::Transpose

Synopsis

Data::Reshapers v0.1.9

Authors

License

Dependencies

Test Dependencies

Provides

Documentation