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==== procedure ==== |
==== procedure ==== |
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Procedures are also data types that can be assigned both to and from. This allows for interesting capabilities such as tracing built-in functions, inserting a processing wedge around a procedure, creating procedures that can apply arbitrary functions, and modifying the behavior of procedures in more radical ways. |
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Consider the following code snippet which sets the variable verbose to the procedure write if any argument is "--verbose" or 1 (effectively a no-operation) otherwise: |
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<lang Icon> if !arglist == "--verbose" then verbose := write else verbose := 1 |
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... |
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verbose("Some verbose mode diagnostic message :",var1, var2) |
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</lang> |
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Examples of parametrized procedures can be found in [[Sorting algorithms/Bubble sort#Icon and Unicon]] and [[Apply a callback to an array#Icon and Unicon]]. |
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==== objects (unicon) ==== |
==== objects (unicon) ==== |
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Objects (mutable) |
Objects (mutable) |