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Old June 27th, 2007, 01:18 AM
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Default return more then one array from class file

hi all.

i have created a class file.
In class file i created a function with some input.
In that function i have created three arrays with some values.
now i want to return these three arrays from that single function.


how can i do this...
pl help.

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Komila Kalia
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Old June 27th, 2007, 05:08 AM
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U cannot return more than one value or array from a single function.

U can create a hashtable and store those values as key and pair and return the hashtable and u can seggregate the values based on key.

Banu
 
Old June 27th, 2007, 06:28 AM
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thnks banoo..
but i got the other way also as to create public arrays.
and returning the values.

thnks again.

 
Old June 27th, 2007, 12:39 PM
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You could also use "out" parameters to get more than one.

 
Old June 27th, 2007, 07:10 PM
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In my opinion, use public fields (i.e. arrays in your case) on the class for method return data isn't as clean an implementation as creating a return data structure that the method returns itself.

Also, with OO languages, I see no reason for out parameters. While it is true that you can only return "one" value from a method, that value can be anything.

While you could return an array of arrays, this requires you to know the magic numbers of the outer array for the inner values. Not very friendly for the method consumers.

What about creating a small class to contains the data to return? The class can have a public property for each array you need to return. That way you get a single return value (an instance of your return data class) that has logically named members for the data. This provides greater flexibility because you can address the data by an explicit name instead of a magic array index while also making it considerably more consumer friendly.

I use this pattern to create "ReturnArg" classes. The return argument classes often have status codes as well as the actual return data.


-Peter





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