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Collections: Difference between revisions
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→{{header|Ursala}}
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=={{header|Ursala}}==
There are several kinds of
having their own operators and type constructors associated with
them. All storage is immutable, but one may "add" to a collection
by invoking a function that
The examples shown below populate the
types expressed literally, but they could also be aggregate
or abstract types, functions, symbolic names or expressions.
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z = 3:<6,8>
</lang>
This function takes a pair of a new head and an existing list,
and returns one that has the new head "added" to it.
<lang Ursala>
foo ("newhead","existing-list") = "newhead":"existing-list"
</lang>
===Sets===
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