vl-string-mismatch

(vl-string-mismatch strA strB [ pos1 [ pos2 [ ignoreCase ] ] ] )

This function compares strA against strB to identify the longest common (identical) sub-string part.

Arguments	strA (string) first string to be verified strB (string) second string to be verified pos1 (integer, optional) the start index in strA; if omitted, 0 is used (start of strA) pos2 (integer, optional) the start index in strB; if omitted, 0 is used (start of strB) ignoreCase (T/NIL, optional) if specified as T, the case of the strings is ignored; otherwise the strings are processed case-sensitive; default NIL
Return	(integer) the length of the common (identical) sub-string parts
Example	(vl-string-mismatch "abcXYZ" "AbC ABCxyz") 0 (vl-string-mismatch "abcXYZ" "AbC ABCxyz" 0 0 t) 3 (vl-string-mismatch "abcXYZ" "AbC ABCxyz" 0 4 t) 6 (vl-string-mismatch "abcXYZ" "AbC ABCxyz" 0 4 nil) 0
Remarks	first character position/index in a string is at index 0