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Declaring NULL capable variables [message #903930]

Mon, 27 August 2012 10:59

Richard Moulton

Messages: 92
Registered: August 2011
Location: Devon, UK

Member

When defining a simple value variable I know how to define the field as NULL capable, such as the following, and understand that by default the field will contain a NULL value.

myInt int?;
myString string?;

But how do I declare an array as being NULL capable?

I tried all of the following and they all appear to be valid but I don't understand the difference.

myIntArray1 int[]?;
myIntArray2 int?[];
myIntArray3 int?[]?;

As a side note the section within code snippets, on the EDT:Declaring data page, I think there's a typo; the second example in the Values of type List isn't correct. Once I know the answer (to the above question) I can update it.

nullVals Int[];

Richard

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Re: Declaring NULL capable variables [message #903954 is a reply to message #903930]

Mon, 27 August 2012 12:41

Justin Spadea

Messages: 66
Registered: July 2009

Member

Hi Richard,

Here's an explanation of each array type:

myIntArray0 int[];
The array field cannot be null, and elements in the array cannot be null.

myIntArray1 int[]?;
The array field can be null, but elements in the array cannot be null.

myIntArray2 int?[];
The array field cannot be null, but elements in the array can be null.

myIntArray3 int?[]?;
The array field can be null, and elements in the array can be null.

You are correct about the snippet being wrong, it should be "nullVals Int?[];"

Hope this clears things up.

-Justin

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