![]() How to save and store a user-defined function in an Excel Workbook? RemoveDuplicates = Join(filter(aUnique, aUnique(0), False), ",") Finally, the “Filter” function filters the array and returns only the unique elements. The “Join” function concatenates the elements using a comma separator. ReDim Preserve aUnique(0 To X) aUnique(X) = Trim(a) For Each a In aSplit vMatch = Application.Match(Trim(a), aUnique, 0) If the item does not appear in the unique array, the function trims the value and adds it to the array. The next section fills the array, which contains strings separated by a comma. The string is a separator used to separate the elements in the array. The ReDim Preserve statement resizes the array that contains unique values “ aUnique(0)” is assigned the result of the function. Splits the input string into an array of individual values, separated by a comma, and stores the result in the “ aSplit” variable. Dim aSplit As Variant, aUnique() As Variant, vMatch As Variant, a As Variant, X as Integer Function RemoveDuplicates(v As Variant) As StringĪfter that, we declare four variables. ![]() RemoveDuplicates = Join(filter(aUnique, aUnique(0), False), ",")įirst, we must declare the input parameter “v” as a variant data type. VMatch = Application.Match(Trim(a), aUnique, 0) Function RemoveDuplicates(v As Variant) As Stringĭim aSplit As Variant, aUnique() As Variant, vMatch As Variant, a As Variant, X as IntegerĪUnique(0) = ("|^|", 20) The output is a string of unique values joined and returned by the function. Then, it splits the input string, checks each value against a list of unique values, and adds new ones. The demonstrated Excel user-defined function removes duplicates from a comma-separated string. In this section, I’ll show you how to write your own UDF. With its help, you can expand the built-in Excel function library and provide solutions for advanced tasks.Įxcel has hundreds of great functions, but sometimes we face almost impossible challenges in the case of string manipulations or lookups. User Defined Functions (UDFs) are small VBA codes that contain powerful custom functions. User-defined functions in Excel, also known as UDFs, are powerful custom functions that provide solutions for advanced tasks.
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