5.3.13. The Relation Class

A relation is a collection with indexes that can be any object. In a relation, each item is associated with a single index, but there can be more than one item with the same index (unlike a table, which can contain only one item for any index).

Table 5.23. ooRexx Relation Class

Object
↓
Relation
+ MapCollection
new
allAt allIndex allIndexes allItems at, [] difference empty hasIndex hasItem index intersection isEmpty	items makeArray put, []= remove removeAll removeItem subset supplier union uniqueIndexes xor

Note

The Relation class also has available class methods that its metaclass, the Class class (Section 5.1.2, “The Class Class”), defines. It also inherits methods from the MapCollection (Section 5.3.3, “The MapCollection Class”) class.

5.3.13.1. Inherited Methods

Methods inherited from the Object class (Section 5.1.1, “The Object Class”).

new (Class Method)	init	send
= \= == \== <> ><	instanceMethod	sendWith
\|\| '' (abuttal)' ' (blank)	instanceMethods	setMethod
(Operator Methods)	isA	start
class	isInstanceOf	startWith
copy	objectName	string
defaultName	objectName=	unsetMethod
hasMethod	request
identityHash	run

Methods inherited from the Collection class (Section 5.3.2, “The Collection Class”).

[]	equivalent	put
[]=	hasIndex	subset
allIndexes	hasItem	supplier
allItems	index	union
at	intersection	xor
difference	items
disjoint	makeArray

Methods inherited from the MapCollection (Section 5.3.3, “The MapCollection Class”).

putAll