![]() To avoid such conflicts, ReDim should not be used as a declarative statement, but simply for redimensioning arrays.Include Container.S1 with type 'a t := 'a t type 'a t val mem : 'a t -> 'a -> equal: ( 'a -> 'a -> bool) -> boolĬhecks whether the provided element is there, using equal. If another variable with the same name is created later, even in a wider scope, ReDim will refer to the later variable and won't necessarily cause a compilation error, even if Option Explicit is in effect. The ReDim statement acts as a declarative statement if the variable it declares doesn't exist at the module level or procedure level. ![]() Until it is assigned an object, the declared object variable has the special value Nothing, which indicates that it doesn't refer to any particular instance of an object. Each element of a user-defined type variable is initialized as if it were a separate variable.Ī variable that refers to an object must be assigned an existing object by using the Set statement before it can be used. Variant variables are initialized to Empty. When variables are initialized, a numeric variable is initialized to 0, a variable-length string is initialized to a zero-length string (""), and a fixed-length string is filled with zeros. If you make an array smaller than it was, data in the eliminated elements will be lost. Similarly, when you use Preserve, you can change the size of the array only by changing the upper bound changing the lower bound causes an error. The following example shows how you can increase the size of the last dimension of a dynamic array without erasing any existing data contained in the array. However, if your array has two or more dimensions, you can change the size of only the last dimension and still preserve the contents of the array. For example, if your array has only one dimension, you can resize that dimension because it is the last and only dimension. If you use the Preserve keyword, you can resize only the last array dimension and you can't change the number of dimensions at all. If the array is contained in a Variant, the type of the elements can be changed by using an As type clause, unless you are using the Preserve keyword, in which case, no changes of data type are permitted. However, you can't declare an array of one data type and later use ReDim to change the array to another data type, unless the array is contained in a Variant. Use the ReDim statement repeatedly to change the number of elements and dimensions in an array. ![]() The ReDim statement is used to size or resize a dynamic array that has already been formally declared by using a Private, Public, or Dim statement with empty parentheses (without dimension subscripts). For a Variant containing an array, type describes the type of each element of the array, but doesn't change the Variant to some other type. Use a separate As type clause for each variable being defined. Data type of the variable may be Byte, Boolean, Integer, Long, Currency, Single, Double, Decimal (not currently supported), Date, String (for variable-length strings), String length (for fixed-length strings), Object, Variant, a user-defined type, or an object type. The lower bound is zero if no Option Base statement is present. When not explicitly stated in lower, the lower bound of an array is controlled by the Option Base statement. The subscripts argument uses the following syntax: upper upper ]. Dimensions of an array variable up to 60 multiple dimensions may be declared. Name of the variable follows standard variable naming conventions. Keyword used to preserve the data in an existing array when you change the size of the last dimension. The ReDim statement syntax has these parts: Part Used at the procedure level to reallocate storage space for dynamic array variables.
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