Category:Wren-trait: Difference between revisions
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'''Wren-trait''' is a module which provides the abstract classes: Comparable, Cloneable and CloneableSeq. The first of these enables child classes to easily support the basic comparison operators and the latter two enables such classes to identify themselves as ''cloneable'' given a suitable mechanism.
It also contains the wrapper classes: Stepped, Reversed, Indexed, ByRef and ByKey plus a helper class SeqEntry. The first two of these enable sequences to be iterated in either (or both) a stepped fashion (steps > 1) or in reverse. The third enables
ByRef enables a value to be passed ''by reference'' to a method or function and ByKey enables a reference type object to be used as a Map key.
It is the fifth in a series of modules (listed on the language's [[https://rosettacode.org/wiki/Category:Wren main page]]) designed to assist with writing Rosetta Code tasks so the same code does not have to be written or copy/pasted time and time again thereby bloating a task's script code unnecessarily. It is also small enough to be used by other modules in the series which are usually organized and written to avoid inter-dependencies.
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