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Task/String-matching/NewLISP/string-matching.newlisp

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+(setq str "abcdefbcghi")
+
+;; test if str starts with "ab"
+(starts-with str "ab")
+
+;; find "bc" inside str
+(find "bc" str)
+
+;; test if str ends with "ghi"
+(ends-with str "ghi")
+
+;; find all positions of pattern inside str
+(define (find-all-pos pattern str)
+  (let ((idx -1) (pos '()))
+    (while (setq idx (find pattern str 0 (+ idx 1)))
+      (push idx pos -1))))
+
+(find-all-pos "bc" str)