Comparison of programming languages (associative array): Difference between revisions

Revision as of 14:31, 5 November 2015

Revision as of 21:46, 29 December 2015

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This returns an Option type, Scala's equivalent of a [[Monad (functional programming)#The Maybe monad|the Maybe monad]] in Haskell.

−=== [[Smalltalk]] ===

In Smalltalk a dictionary is used:

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Dictionary hashes/compares based on equality and holds

[[Garbage collection (computer science)#Strong and weak references|strong references]] to both key and value. Variants exist which hash/compare on identity (IdentityDictionary) or keep [[Garbage collection (computer science)#Strong and weak references|weak references]] (WeakKeyDictionary / WeakValueDictionary).

Because every object implements #hash, any object can be used as key (and of course also as value).

=== [[SNOBOL]] ===