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FileMaker Pro Custom Functions

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DecToAlpha ( decimal )

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Average rating: 3.4 (20 votes)
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Michael Horak, *COMMENT Visual Realisation
http://comment.cjb.net

Returns the representation of a decimal number as a variable-length alphabetic text string.

Sample Input:

0
1
2

25
26
27

51
52
53

701
702
703

18277
18278
18279

etc.

Sample Output:

A
B
C

Z
AA
AB

AZ
BA
BB

ZZ
AAA
AAB

ZZZ
AAAA
AAAB

etc.

/* DecToAlpha function Author *COMMENT Visual Realisation Format DecToAlpha ( decimal ) Parameters decimal - any numeric expression or field containing a non-negative numeric expression. NOTE: Only the integer part of decimal will be considered. Data type returned text Description Returns the representation of a decimal number as a variable-length alphabetic text string. January 18, 2006 */ Let ( [ alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" ; base = Length ( alpha ) ; bit = Mod ( decimal ; base ) ; char = Middle ( alpha ; bit + 1 ; 1 ) ; next = Div ( decimal ; base ) ] ; Case ( next ; DecToAlpha ( next - 1 ) ) & char )
Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed

Description:

Returns the representation of a decimal (base-10) number as a variable-length alphabetic text string, similar to the column headings in Excel: A, B, C ... Z, AA, AB ... AZ, BA, BB ... ZZ, AAA, AAB ... ZZZ, AAAA, AAAB, etc.

NOTE:
DecToAlpha expects numbers to start at 0 (zero). In other words, DecToAlpha (0) returns "A", while DecToAlpha (1) returns "B". If your numbers start at 1, and you want the number 1 to be represented as "A", use DecToAlpha (decimal - 1).

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

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