NAME

FP::Abstract::Sequence - functional sequence protocol

SYNOPSIS

            

              
              
use FP::Predicates qw(is_sequence is_proper_sequence);
# ^ placed here because we can't export functions from
#     FP::Abstract::Sequence
use FP::PureArray;
use FP::StrictList;
use FP::List;
use FP::Stream;
use FP::Array 'array';
use FP::Equal 'is_equal';
is_equal list(purearray(3, 4), 
              strictlist(3, 4), 
              list(3, 4), 
              stream(3, 4), 
              cons(3, 4), 
              array(3, 4),  # Should we change this given `FP::autobox`?
              3,
              {3 => 4})->map(\&is_sequence),
         list(1, 1, 1, 1, 1, undef, undef, undef);
is is_sequence(cons 3, 4), 1;
is is_proper_sequence(cons 3, 4), 0; # improper list
my $ns = purearray(FP::Abstract::Sequence->FP_Interface__method_names);
#  The methods you can count on being supported by sequences.
is_equal $ns->sort->take(5),
         purearray('any', 'append', 'array', 'cons', 'drop');
            
          

DESCRIPTION

This is a functional protocol, i.e. its use does not exert any side effects (that are visible to the user). It does *not* imply `FP::Abstract::Pure`, though; impure data structures could implement it all the same (in addition to a mutation protocol).

SEE ALSO

FP::Abstract::Pure

NOTE

This is alpha software! Read the status section in the package README or on the website.