I represent an access mechanism for a sequencable collection re-ordering or filtering its elements.

	adding
	add:

	copying
	copy

	enumerating
	collect: do: select:

	printing
	storeOn:

	private
	setCollection:map: species

	accessing	top
	at: Primitive. Assumes receiver is indexable. Answer the value of an indexable element in the receiver. Fail if the argument index is not an Integer or is out of bounds. Essential. See Object documentation whatIsAPrimitive.
	at:put: Primitive. Assumes receiver is indexable. Store the argument value in the indexable element of the receiver indicated by index. Fail if the index is not an Integer or is out of bounds. Or fail if the value is not of the right type for this kind of collection. Answer the value that was stored. Essential. See Object documentation whatIsAPrimitive.
	contents Answer the receiver's domain for mapping, a Dictionary or SequenceableCollection.
	size Answer how many elements the receiver contains.

	adding	top
	add: Include newObject as one of the receiver's elements. Answer newObject. ArrayedCollections cannot respond to this message.

	copying	top
	copy This returns another MappedCollection whereas copyFrom:to: will return an object like my domain.

	enumerating	top
	collect: Refer to the comment in Collection|collect:.
	do: Refer to the comment in Collection|do:.
	select: Refer to the comment in Collection|select:.

	printing	top
	storeOn: Refer to the comment in Object|storeOn:.

	private	top
	setCollection:map:
	species Answer the preferred class for reconstructing the receiver. For example, collections create new collections whenever enumeration messages such as collect: or select: are invoked. The new kind of collection is determined by the species of the original collection. Species and class are not always the same. For example, the species of Interval is Array.

	instance creation	top
	collection:map: Answer an instance of me that maps aCollection by aSequenceableCollection.
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.
	newFrom: Answer an instance of me containing the same elements as aCollection.