Question

In a lisp function I’ve got the following test with a regular expression that should match any string that starts with a capital letter:

(if (string-match "^[A-Z].+" my-string)

However this matches also the lower case starting strings. What am I missing here?

Answer 1

From string-match description ( to show it type C-h f or M-x describe-function ):

(string-match REGEXP STRING &optional START)

Return index of start of first match for REGEXP in STRING, or nil.
Matching ignores case if `case-fold-search’ is non-nil.

Just set case-fold-search to nil.

(let ((case-fold-search nil))
 (string-match "^[A-Z].+"  my-string))