POSDIFF()
The left-most position there two string differ
Syntax
POSDIFF( <cString1>, <cString2>, [<nIgnore>] )
-> nPosition
Arguments
<cString1> and <cString2> Designate the two character strings that are compared.
<nIgnore> Designates how many characters at the beginning of the character strings are excluded from the search. The default value excludes none (0).
Returns
POSDIFF() returns the first position where <cString1> and <cString2> differ. If both character strings are equal, then the function returns 0.
Description
POSDIFF() compares two strings and determines from which position the first difference occurs. The <nIgnore> parameter allows you to exclude a particular number of characters from the beginning of both character strings from the search.
Note
. Character strings of different lengths can be compared with each other (see examples).
Examples
. This example compares two strings of the same length:
cString1 := "X23AB\/A"
cString2 := "X23A8\/A"
? POSDIFF(cString1, cString2) // Result: 5
. Two strings of different lengths can also be compared:
? POSDIFF("AB", "ABC") // Result: 3
Compliance
POSDIFF() is compatible with CT3’s POSDIFF().
Platforms
All
Files
Source is posdiff.c, library is libct.
Seealso
POSEQUAL()