[dictionary]

Description

This is a simple custom type for storing and retrieving arbitrary name=value pairs on the fly. It's essentially [map] without the need for ->insert and ->find. You can still use all the standard member tags of [map], though, including ->size,  ->keys, ->values, ->contains, and ->remove.

Sample Usage

'Initialize and Display:
';
/* this works as well as the method below
var('user') = dictionary(
	'name' = 'John Smith',
	'address' = '1234 This Way',
	'city' = 'Anytown',
	'state' = 'KY',
	'zip' = 90210
);
// */

// /*
var('user') = dictionary;
$user->name = 'John Smith';
$user->address = '1234 This Way';
$user->city = 'Anytown';
$user->state = 'NE';
$user->zip = 90210;
// */

$user->name + '
';
$user->address + '
';
$user->city + ', ' + $user->state + ' ' + $user->zip;



'
Keys: ';	
$user->keys;

'
Values: ';
$user->values;

'
Size: ';
$user->size;

'
Remove and Contains: ';
$user->remove('zip');
$user->contains('zip');

'
Convert: ';
$user;

Source Code

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define_type(
	'dictionary',
	-prototype,
	-description='A basic dictionary type.'
);	
	define_tag('oncreate');
		local('ivars') = @self->properties->first;
		
		iterate(params, local('i'));
			if(!#i->first->waskeyword && #i->isa('pair'));
				#ivars->insert(#i->first = #i->second);
			/if;
		/iterate;
	/define_tag;

	define_tag('size');
		return(self->properties->first->size);
	/define_tag;

	define_tag('onconvert');
		return(self->properties->first);
	/define_tag;

	define_tag('_unknowntag');		
		local('ivars') = @self->properties->first;
		local('maptags') = @#ivars->properties->second;
		
		#maptags->keys >> tag_name ? return(
			@#maptags->find(tag_name)->run(
				-owner=self->properties->first,
				-params=params
			)
		);

		#ivars->keys !>> tag_name ? #ivars->insert(tag_name = dictionary);
		return(@#ivars->find(tag_name));
	/define_tag;
/define_type;

Related Tags

• paypal_nvpapi
• yahoo_search

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