Return Empty Arrays Too

Return Empty Arrays Too

With VB6 came the ability to return arrays from functions. Returning an uninitialized array is a problem because there is no easy way?other than error-trapping?to find whether an array has been dimensioned. Also, ReDim myArr(-1) does not work. You can use the Split function to return an empty array?one with no elements and no data&$151;and an LBound of 0 and an UBound of -1. This practice simplifies code for looping through the returned array:

 Private Function Foo(args...) As String()Dim myArr() As String' Initialize array dimensions as 0 to -1myArr = Split("")If Condition ThenReDim myArr(n)' further processing...End IfFoo = myArrEnd Function

Here, no additional checking is required to use Foo. But omitting the call to Split can lead to a “Subscript out of range” error in a routine that attempts to use Foo

See also  5 Ways to Improve Customer Experience

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist