Core Function Soundex
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Soundex( <str> )
Contents |
Description
Calculate the soundex key of a string.
Parameters
string
The input string.
Return Value
Returns the soundex key as a string.
Remarks
Soundex keys have the property that words pronounced similarly produce the same soundex key, and can thus be used to simplify searches in databases where you know the pronunciation but not the spelling.
This soundex function returns a string 4 characters long, starting with a letter.
This particular soundex function is one described by Donald Knuth in "The Art Of Computer Programming, vol. 3: Sorting And Searching", Addison-Wesley (1973), pp. 391-392.
Example
say soundex("Euler"); // E460 say soundex("Gauss"); // G200 say soundex("Hilbert"); // H416 say soundex("Knuth"); // K530 say soundex("Lloyd"); // L300 say soundex("Lukasiewicz"); // L222
