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- Passing a fixed array as parameter to a procedure
- Declaring a fixed array member
- Dimension of a fixed array
- Fixed array of arrays, associative array, queue, stack, list
- Limitations: Elements of fixed array
Fixed array (Type of variable) In french: Tableau fixe (Type de variable)
A fixed array is an "advanced" type of array: the dimensions of this array are defined during the compilation and they cannot be modified. The dimensions of a fixed array are defined during the compilation, only if the dimensions of this array correspond to: - an integer,
- a constant that was created beforehand.
Otherwise, a WLanguage error occurs during the compilation of the project. Reminder: An array is a structured type that is used to group a set of elements of the same type. Each element of the array can be accessed by its index. It is recommended to use: - A fixed array to pass an array as parameter to the Windows API functions.
- A dynamic array or a "simple" array when the size of the array must be modified during the program execution.
- An associative array to store the elements indexed on any type of information.
// Declare a fixed array
CustomerArray is fixed array of 5 by 7 by 3 int
// Equivalent to: CustomerArray is fixed array of 5,7,3 int
// Refer to a fixed array
CustomerArray[2,5,3] = 47
// Equivalent to: CustomerArray[2][5][3] = 47
Syntax
Declaring a fixed array
<Array name> is fixed array [ <Dimension 1> [,<Dimension 2> ... [,<Dimension 10>]] ] <Type of array elements>
Example:
arrString is fixed array [10] strings
arrInt is fixed array [5,9] int
<Array name> is fixed array of <Dimension 1> [by <Dimension 2> ... [by <Dimension 10>]] <Type of array elements> OR <Array name> is fixed array of <Dimension 1> [,<Dimension 2> ... [,<Dimension 10>]] <Type of array elements>
<Array name>: Name of the array variable to declare. <Dimension 1>...<Dimension 10>: Dimension 1 to 10 of the array (integer value). <Type of array elements>: Type of the elements found in the array. See the different types of variables.
Remark: The an keyword is optional: it is an optional word.
Referring to an element in a fixed one-dimensional array:
<Array name>[Index1]
Referring to an element in a fixed two-dimensional array:
<Array name>[Index1, Index2] OR <Array name>[Index1][Index2]
Referring to an element in a fixed N-dimensional array:
<Array name>[Index1, ... , IndexN] OR <Array name>[Index1]...[IndexN]
Passing an array as parameter to a procedure: Hide the details
<Procedure name>(<Array name>)
<Array name>: Name of the fixed array to use. <Index1>: Index of the element for the 1st dimension. <Index2>: Index of the element for the 2nd dimension. <IndexN>: Index of the element for the Nth dimension (N <= 10).
Remark: An array cannot be handled as a whole. For example, an array cannot be assigned to another array. Remarks Passing a fixed array as parameter to a procedure A fixed array can be passed as parameter to a procedure. To do so, use the following syntax:
<Procedure name>(<Array name>)
For example:
SupplierArray is fixed array of 10 by 50 string
// Call to the DisplayArray procedure
DisplayArray(SupplierArray)
Declaring a fixed array member A "fixed array" member can be declared in: - A class. This fixed array is directly allocated in the memory area of this class.
- A composite variable. This fixed array is directly allocated in the memory area of this composite variable.
- A structure <Structure name>. This fixed array is directly allocated in the memory area of each <Structure name> variable.
For example:
Struct is Structure
n1 is int
nArray is fixed array of 2 int
n2 is int
END
MyStructure is Struct
Representation of the memory area of "MyStructure": This memory representation is compatible with the Windows APIs. Therefore, a fixed-size array can be transmitted to a function of the Windows APIs. Dimension of a fixed array The Dimension function and the Count property are used to get the number of elements in a fixed array. Reminder: A fixed array cannot be resized. Limitations: Elements of fixed array - A fixed array can include classes only if these classes have a constructor without parameter (or with optional parameters).
- A fixed array cannot be made of composite variables.
- The size of a fixed array cannot exceed 2GB.
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| | //Example Array [N,X]
arrMensajes is array of 1 by 3 strings
i is int = 1
SQLExec(sQuery,ds)
WHILE SQLFetch(ds) = 0
arrMensajes[i,1] = SQLGetCol(ds, 1) //id
arrMensajes[i,2] = SQLGetCol(ds, 2) //numero
arrMensajes[i,3] = SQLGetCol(ds, 3) //mensaje
i++
Dimension(arrMensajes, i, 3)
END |
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