"vba array declaration and initialization" Code Answer's
You're definitely familiar with the best coding language VBA that developers use to develop their projects and they get all their queries like "vba array declaration and initialization" answered properly. Developers are finding an appropriate answer about vba array declaration and initialization related to the VBA coding language. By visiting this online portal developers get answers concerning VBA codes question like vba array declaration and initialization. Enter your desired code related query in the search bar and get every piece of information about VBA code related question on vba array declaration and initialization.
excel vba initialize entire array
'VBA function to create a 2D array with every element set 'to the same initial value: Function Init2D(rows, cols, Optional val) Dim i&, j& ReDim v(1 To rows, 1 To cols) If Not IsMissing(val) Then For i = 1 To rows For j = 1 To cols v(i, j) = val Next Next End If Init2D = v End Function 'This version uses no loops: Function Init2D(rows, cols, Optional val = "") Const NUMER = "index(offset(a1,,,ROWS,COLS)*0+VAL,,)" Const ALPHA = "index(rept("""",len(offset(a1,,,ROWS,COLS))<0)&""VAL"",,)" DoEvents Init2D = Evaluate(Replace(Replace(Replace(IIf(IsNumeric(val), NUMER, ALPHA), "VAL", val), "ROWS", rows), "COLS", cols)) End Function '-------------------------------------------------------------------- '10 rows, 1 column, all elements = 0: a = Init2D(10, 1, 0) '20 rows, 5 columns, all elements = "abc": a = Init2D(20, 5, "abc") '-------------------------------------------------------------------- '1D array version: Function Init1D(elems, Optional val, Optional base = 1) Dim i&, max& max = base + elems - 1 ReDim v(base To max) If Not IsMissing(val) Then For i = base To max v(i) = val Next End If Init1D = v End Function
vba array declaration and initialization
'VBA arrays can be fixed-size (static) or resizable (dynamic). 'This is determined when the array is declared: Dim vArrA() 'dynamic: size is determined later. Dim vArrB(1 to 5) 'static: size is determined now and cannot be changed. 'Array size refers to the number of elements in the array. For example, vArrB() 'above has five elements. The "1 to 5" is referred to as the array's range of 'indices. The range size must be positive, meaning the number of elements must 'be positive. This means that the 2nd integer in the range must be greater 'or equal to the first integer. 'VBA is unusual among programming languages with regards to the lowerbound or 'the base, of arrays. Most languages require arrays to have a base (or lowerbound) 'of zero. VBA arrays can have lowerbounds of ANY Long Integer value '(-2147483648 through +2147483647). So, all of the following are valid: Dim vArrC(0 to 9) Dim vArrD(1 to 10) Dim vArrE(11 to 20) Dim vArrF(-8877 to -8868) Dim vArrG(-5 to 4) 'vArrC through vArrG are perfectly legal and each has precisely 10 elements. Note 'that the size AND the bounds are fixed for static arrays. Both of these 'attributes can be changed for dynamic arrays whenever the need arises: ReDim vArrA(1 to 1000) 'And at a later point: ReDim vArrA(0 to 4) 'A third attribute of VBA arrays is the number of dimensions. Every example on 'this page thus far represents a 1D array. Another term for a one-dimensional 'array is vector. A vector does not really have rows or columns, just 'elements. 'However, when writing a 1D array to a worksheet, Excel treats the array as if 'it were a 2D array consisting of 1 row and n colums (where n is equal to the 'number of elements). This fact causes confusion for many. 'Consider: ReDim vArrA(1 to 5) vArrA(1) = "m" vArrA(2) = "n" vArrA(3) = "o" vArrA(4) = "p" vArrA(5) = "q" Sheet1.Range("A1:E5") = vArrA 'Sheet1 now has the following values: ' A B C D E '1 m n o p q '2 m n o p q '3 m n o p q '4 m n o p q '5 m n o p q 'This is why Transpose() is required to write the 1D array vertically: Sheet1.Range("A1:E5") = WorksheetFunction.Transpose(vArrA) 'Sheet1 now has the following values: ' A B C D E '1 m m m m m '2 n n n n n '3 o o o o o '4 p p p p p '5 q q q q q 'Notice that the one array with five elements can be written to multiple rows 'or with Transpose() to multiple columns. Of course, the array can be 'written to one row: Sheet1.Range("A1:E1") = vArrA 'Or to one column: Sheet1.Range("A1:A5") = WorksheetFunction.Transpose(vArrA) 'Since Excel treats 1D arrays (vectors) oddly when writing to a worksheet, it 'can be easier to work with 2D arrays. In Excel VBA, 2D arrays are row major. 'This means that rows are represented by the first dimension and columns are 'represented by the second. ReDim vArrA(1 to 5, 1 to 10) ' ^rows ^cols 'vArrA is now sized as a 2D array with 5 rows of 10 columns. It can be written 'to a worksheet with 5 rows of 10 columns without using Transpose(). 'Size, lower and upper bounds, and number of dimensions 'are all fixed for static arrays and they are all specified when the array is 'declared: Dim vArrH(0 to 9, 1 to 10) 'vArrH is a static 2D array of 100 elements, 10 rows of 10 columns, with '0 as the lowerbound for the first dimension (the rows) and 1 as the lowerbound 'of the second dimension (the columns). None of these attributes can later 'be changed for vArrH, since it is a static (or fixed) array. In contrast, 'all three of these attributes can be changed for a dynamic array... at any time. 'The max number of dimensions supported for an array is 60, though 'it is unusual to use arrays with more than 3 dimensions. Conceptually, a '1D array is a vector, a 2D array can be thought of as a worksheet with rows 'and columns, a 3D array can be thought of as a workbook with multiple 'worksheets (or a cube), and a 4D array can be thought of a folder of workbooks '(or perhaps a hypercube). But keep in mind that each dimension can be declared 'with a different number of elements. For example, a 4D dynamic array: ReDim vArrA(0 to 4, 1 to 10, 3 to 7, 1 to 2) ' ^rows ^cols ^sheets ^books 'A fourth attribute of arrays is the data type. VBA's default data type 'is the Variant. If no data type is specified then by default the data type is actually Variant. So all the 'examples so far are Variant arrays, that is an array where every single element 'is of data type Variant. 'Here are some other data type array examples. They can be written verbosely 'or in some cases with a type declaration character: Dim a() As Double 'or... Single, Short, Long, Currency, String, Byte, Date 'or... Boolean, UserDefinedType, ClassName, Object Dim a#() 'or... a!(), a%(), a&(), [email protected](), a$() 'Note: 64bit VBA also includes the LongLong data type: Dim a() As LongLong 'or... a^()
All those coders who are working on the VBA based application and are stuck on vba array declaration and initialization can get a collection of related answers to their query. Programmers need to enter their query on vba array declaration and initialization related to VBA code and they'll get their ambiguities clear immediately. On our webpage, there are tutorials about vba array declaration and initialization for the programmers working on VBA code while coding their module. Coders are also allowed to rectify already present answers of vba array declaration and initialization while working on the VBA language code. Developers can add up suggestions if they deem fit any other answer relating to "vba array declaration and initialization". Visit this developer's friendly online web community, CodeProZone, and get your queries like vba array declaration and initialization resolved professionally and stay updated to the latest VBA updates.