Collectors
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Collectors
A useful kind of object when building a collection is a collector. A collector is a node
in a linked list of collectors.
All objects that inherit from defaultBehavior respond to the binary message & by
making a new collector list containing the receiver and argument. Collectors
respond to & by appending the argument to the list. Collector lists can be
converted to the other kinds of collections using asList, asSequence, asSet, etc.
Hence, a convenient way to make a collection from literal objects is using
collectors:
(1 & false & nil & 'foo') asVector
Because the & operation is fast, a collector is also a useful way of accumulating all
the elements of a collection before actually constructing the collection.
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