How To Trim all Items in String Array

Issue: String Array Items do NOT Trim Using For Each Loop
Level: Beginner

Knowledge Required:

• For Each Loop
• For Next Loop
• Arrays

Description:
It is observed that when we use For Each Loop to iterate through a String Array and perform some action with each item then this change does NOT affect the String Array itself. Consider the following code

Dim strArray() As String = {"First Item", "Second Item", "Third Item"}

' First we are trying to add some more
' text with each item in array
For Each strItem As String In strArray
    strItem &= " some data"
Next

' Now again iterate through this array to see
' whether the changes has been made or not
For Each strItem As String In strArray
    Debug.Print(strItem)
Next

The output of above code will be

First Item
Second Item
Third Item

As you can see the output, there is NO change in items since each time value is copied into the variable and that variable was changed NOT the Array item. So to make changes in each item we will be using the For Next loop as,

Dim strArray() As String = {"First Item", "Second Item", "Third Item"}

' First we are trying to add some more ' text with each item in array
For i As Integer = 0 To strArray.Length - 1
    strArray(i) &= " some data"
Next

' Now again iterate through this array to see
' whether the changes has been made or not
For Each strItem As String In strArray
    Debug.Print(strItem)
Next

The output of above code will be

First Item some data
Second Item some data
Third Item some data