CFLib.org – Common Function Library Project

SoundexDifference(str1, str2)

Last updated May 26, 2003

author

Benjamin Pate / Steve Bianco

Version: 1 | Requires: CF5 | Library: StrLib

Description:
Returns the difference between the SOUNDEX values of two strings as an integer from 0-4. 0=No match, 4=Exact match. This function replicates the COMPARE function in MS SQL 2000, comparing the SOUNDEX values of two strings. This UDF requires the Soundex function by Ben Forta, which can be downloaded from cflib.org

Return Values:
Returns a number.

Example:

<cfoutput>
	#soundex('steven')# #soundex('stephen')# #SoundexDifference('steven', 'stephen')#<br>
</cfoutput>

Parameters:

Name Description Required
str1 First string. Yes
str2 Second string. Yes

Full UDF Source:

/**
 * Returns the difference between the SOUNDEX values of two strings
 * 
 * @param str1 	 First string. (Required)
 * @param str2 	 Second string. (Required)
 * @return Returns a number. 
 * @author Benjamin Pate / Steve Bianco (benjamin@pate.org) 
 * @version 1, May 26, 2003 
 */
/**
 * Returns the difference between the SOUNDEX values of two
 * strings as an integer from 0-4. 0=No match, 4=Exact match.
 *
 * Note: Requires SOUNDEX UDF from Ben Forta
 *
 * @param str1	First string to be compared
 * @param str2	Second string to be compared
 * @return returns a number from 0 to 4
 * @author Benjamin Pate B525 P300 (benjamin@pate.org)
 * @author Steven Bianco S315 B520 (steventbianco@yahoo.com)
 * @version 1, April 17, 2003
 */

function SoundexDifference(str1, str2)
{
	var temp1 = Soundex(str1);
	var temp2 = Soundex(str2);

	var i = 0;
	var result = 0;
	
	for (i = 1 ; i LTE 4 ; i = i + 1)
	{
		if (MID(temp1, i, 1) IS MID(temp2, i , 1))
		{
			result = result + 1;
		}
	}
	return result;
}
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