ST
Size: a a a
ST
T
T
ST
cat (?=(cat))T
cat (?=(cat))T
T
cat (?=(cat))T
ST
|T
|IL
(re-seq #"(\d{4}) (?=(\d{4}) (\d{4}) (\d{4}))" "1111 2222 3333 4444 5555 6666 7777")IL
IL
T
(re-seq #"(\d{4}) (?=(\d{4}) (\d{4}) (\d{4}))" "1111 2222 3333 4444 5555 6666 7777")T
IL
Д
(re-seq #"cat cat" "cat cat cat")
(re-find #"(cat cat)" "cat cat cat")
=> ["cat cat" "cat cat"]
IL