Catmandu::Path::simple - The default Catmandu path syntax

       path
           The string version of the path. Required.

getter
       Returns  a  coderef  that  can  get  the values for the path.  The coderef takes the data as argument and
       returns the matching values as an arrayref.

           my $path = Catmandu::Path::Simple->new(path => '$.foo');
           my $data = {foo => 'foo', bar => 'bar'};
           $path->getter->($data);
           # => ['foo']

   setter
       Returns a coderef that can create the final part of  the   path  and  set  it's  value.  In  contrast  to
       "creator"  this  will  only set the value if the intermediate path exists.  The coderef takes the data as
       argument and also returns the data.

           my $path = Catmandu::Path::Simple->new(path => '$.foo.$append');
           $path->creator(value => 'foo')->({});
           # => {foo => ['foo']}
           $path->creator(value => sub { my ($val, $data) = @_; $val // 'foo' })->({});
           # => {foo => ['foo']}

           # calling creator with no value creates a sub that takes the value as an
           # extra argument
           $path->creator->({}, 'foo');
           $path->creator->({}, sub { my ($val, $data) = @_; $val // 'foo' });
           # => {foo => ['foo']}

   setter(\&callback|$value)
       This is a shortcut for "setter(value =" \&callback|$value)>.

   updater(value=>\&callback)
       Returns a coderef that can update the value of an existing path.

   updater(if_*=>[\&callback])
       TODO

   updater(if=>[\&callback])
       TODO

   updater(if_*=>\&callback)
       TODO

   updater(if=>\&callback)
       TODO

   updater(\&callback)
       This is a shortcut for "updater(value =" \&callback|$value)>.

   creator(value=>\&callback|$value)
       Returns a coderef that can create the path and set it's value. In contrast to "setter" this also  creates
       the intermediate path if necessary.  The coderef takes the data as argument and also returns the data.

           my $path = Catmandu::Path::Simple->new(path => '$.foo.$append');
           $path->creator(value => 'foo')->({});
           # => {foo => ['foo']}
           $path->creator(value => sub { my ($val, $data) = @_; $val // 'foo' })->({});
           # => {foo => ['foo']}

           # calling creator with no value creates a sub that takes the value as an
           # extra argument
           $path->creator->({}, 'foo');
           $path->creator->({}, sub { my ($val, $data) = @_; $val // 'foo' });
           # => {foo => ['foo']}

   creator(\&callback|$value)
       This is a shortcut for "creator(value =" \&callback|$value)>.

   deleter
       Returns  a coderef that can delete the path.  The coderef takes the data as argument and also returns the
       data.

           my $path = Catmandu::Path::Simple->new(path => '$.foo');
           $path->deleter->({foo => 'foo', bar => 'bar'});
           # => {bar => 'bar'}

       Catmandu::Path::simple - The default Catmandu path syntax

       Catmandu::Path.

perl v5.40.0                                       2025-01-17                        Catmandu::Path::simple(3pm)

           my $data = {foo => {bar => ['first_bar', 'second_bar']}};

           my $path = Catmandu::Path::simple->new("foo.bar.0");

           my $getter = $path->getter;
           my $first_bar = $getter->($data);

           my $updater = $path->updater(sub { my $str = $_[0]; uc $str });
           $updater->($data);
           # => {foo => {bar => ['FIRST_BAR', 'second_bar']}}

           # safer version with a type check
           my $updater = $path->updater(if_string => sub { my $str = $_[0]; uc $str });