Difference Function | |
-- todo --
Returns an integer, 0 through 4, which represents the relative phonetic difference between two character expressions.
Namespace:
XSharp.VFP
Assembly:
XSharp.VFP (in XSharp.VFP.dll) Version: 2.21
Syntax FUNCTION Difference(
cExpression1,
cExpression2
) AS USUAL CLIPPER
[ClipperCallingConventionAttribute(new string[] { ... })]
public static Usual Difference(
Usual cExpression1 = default,
Usual cExpression2 = default
)
Request Example
View SourceParameters
- cExpression1 (Optional)
- Type: Usual
Specifies the character expressions that DIFFERENCE( ) compares. - cExpression2 (Optional)
- Type: Usual
Specifies the character expressions that DIFFERENCE( ) compares.
Return Value
Type:
Usual
Numeric
Remarks
Difference( ) is useful for searching tables when the exact spelling of an entry isn't known.
The more alike the two expressions are spelled, the higher the number Difference( ) returns.
If the character expressions are spelled very similarly, Difference( ) returns 4. For two character expressions with little in common phonetically,
Difference( ) returns 0.
Examples 1STORE 'Smith' TO gcName1
2STORE 'Smythe' TO gcName2
3STORE 'Smittie' TO gcName3
4STORE '' TO gcName4
5Clear
6? Difference(gcName1, gcName2)
7? Difference(gcName1, gcName3)
8? Difference(gcName1, gcName4)
See Also