When a list or set of elements with the same type of data is stored in continuous memory, it is called an array. Tables are useful objects often used in software development to organize data. Here are some specific examples of where you can use them:

  1. Online games, such as chess, use two-dimensional tables.
  2. The ECG waveform is an example of the use of real-time networks.

I’ll show you some sample paintings, then we’ll figure out how to verify that they’re empty.

Demo_sub-table()

Declaring an array of variables
Dim arr() as a string

Get the length of table
ReDim arr(8)

For i = 0 – 8
‘Assign data to each element of the array in loop
arr(i) = Cells(i + 2, 1).value

Print each item
Debug.Print arr(i)
Next

Last Subsection

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Here is another example that creates an array after using the split function.

Sub array_split_demo()

List of days within the string separated by a space
days_string = Sunday Monday Tuesday Wednesday Thursday Friday Saturday

Separate the string into an array with the separator
Weekdays = Split(days_string, )

All
for i = LBound (weekdays) to UBound (weekdays)
Debug.Print weekdays(i)
Next

Last Subsection

The above code, when iterated on the array in which the string was created, produces a list of the days on which the string was split and stored.

Species tables

VBA networks can be static or dynamic.

Static networks

The size of the table is fixed and cannot be changed.

Dynamic networks

The size of the table is not fixed and can be adapted to your needs.

Check if table is empty or containsdata .

In VBA, if we don’t define the array size first, we can’t use the Lbound() and UBound functions. This leads to a mistake. So we need to use the Redim keyword and define the size as soon as we declare the table.

There is also no special function to check the presence of data in the table. So we need to use other available functions and some logic to determine whether a table is empty or not.

Below are some methods you can use.

Connection function

Just as we used the split function to divide a string into an array, the join function can be used to join all the elements of an array into a single string.

Syntax:

Go along with it. [ <Loudly Echoing ]

Where

The source array is the name of the array whose elements are to be combined.

The boundary is the character placed between the concatenation of each of the two elements when the elements of the table are brought together. This is an optional parameter, and if not specified, a space is used by default.

If a string with zero length is specified as the delimiter, the connection is made without inserting any characters during the concatenation.

For example:

Sub join_arraydemo()

Connect the orange, apple and mango branches.
Dim all_fruits as string
Dim fruits(0 to 2) as string

Assign values for all fruits
Fruit(0) = Orange
Fruit(1) = Apple
Fruit(2) = Mango

Add with built-in function
all_fruits = Join(fruit)

The all_fruits variable is now set to Orange Apple Mango
Debug.Print all_fruits
End Sub

Thus, all elements of the array are first merged with the merge function, and then the length of the resulting string can be checked to determine whether the array is empty or not.

The following piece of code can be added to the code example above to let you know if the table is empty or not.

If Len(all_fruits) > 0, then
Debug.Print fruit array is not empty
Else
Debug.Print fruit array is empty
End If

In short, we can use the following rule to get the same results.

If Len(Join(all_fruits)) > 0 then

Iterate all elements in table

The For loop allows us to iterate through each element of the array to see if the array contains data or is completely empty. Here’s a ready-made story for you.

The IsEmptyArray(arr) function

variable normal flag
Flag = 0

Cycle to check if at least one element of the array contains data
For i = LBound(arr) To UBound(arr)
If IsEmpty(arr(i)) = False Then
Debug.Print Array contains data
flag = 1
Exit For
End If
Next

Check if the value of the flag changes due to data availability
If flag = 0, then
Debug table is empty
End If

Last function

UBound + error bypass function

Because using the Ubound or Lbound function on an empty array causes an error, we use the On Error Resume Next instruction and enter the error number to verify that the array is empty. Here the table is considered empty if it has no specified size. I created a function to help you understand and use the code.

Subsystem array_check_demo()

Declaring a variable from array
Dim arr() as variable

The array should now be empty
Debug.Print Is_Var_Array_Empty(arr)

Get the length of table
ReDim arr(8)

The board has the size of .
Debug.Print Is_Var_Array_Empty(arr)
‘Before we assign values, we will check if the array is empty

Assign values to the elements of array
For i = 0 to 8
‘Assign data to each element of the array in loop
arr(i) = Cells(i + 2, 1).value
Next

Check if the array is empty again
Debug.Print Is_Var_Array_Empty(arr)

End of subsection
Function Is_Var_Array_Empty(arr_var As Variant)

Dimming n as a whole

If Error Resume Next
p = UBound(arr_var, 1)
If Err.Number = 0 Then
Is_Var_Array_Empty = False
Else
Is_Var_Array_Empty = True
End If

Last function

How to Check if an Array Is Empty in VBA

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Function StrPtr() for byte array

A string of bytes is nothing more than a string of characters. A string can be directly assigned to an array of bytes. Two array elements are used to reserve a space for one character in a string. The following code should help you understand the details.

Sub byte_array_demo()

Declare the array of bytes and the string
Dim arr1() as byte
Dim samplestr as string

Enter line
samplestr = coffee

Check if the plate is empty. StrPtr() returns 0 if the array is empty.
Debugging, printing StrPtr(arr1) = 0

assigns a string directly to the byte array
arr1() = samplestr

See what is stored in Table
for i = LBound(arr1) To UBound(arr1)
Debug.Print arr1(i)
Next

Check if the plate is empty. StrPtr() returns 0 if the array is empty.
Debugging, printing StrPtr(arr1) = 0

Last Subsection

Declaration of departure :

The array is initially empty, so StrPtr(arr1) returns true.

Meaning of the Ascion C – 67

Asci-Zero

The ascian value of o is 111

Asci-Zero

The ascian value of f is 102

Asci-Zero

The ascian value of f is 102

Asci-Zero

The ascian value of e is 101

Asci-Zero

The ascian value of e is 101

Asci-Zero

Finally, the array is not empty, so StrPtr(arr1) returns false.

How to Check if an Array Is Empty in VBA

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Completion

In VBA, except for StrPtr() for arrays of bytes, there are no direct methods for knowing whether an array is empty or not. However, our best friend, Magical VBA, provides flexible features that can be combined with your own logic to control the size of a table or the presence or absence of data in a table of any type.

The target of the EMPTY here is the user. It can either be an array that has no defined size, or an array that has a defined size but no data.

Among the above methods, I recommend taking a custom function that you can easily use to check if the table is empty or not.

Marked with: Tables, Concentration, Link, Loop, Redim, Size, Separation, StrPtr, Bound, VBA

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