concatenate-two

diff --git a/src/string.lisp b/src/string.lisp
index 7e9ae1e..6f88024 100644 (file)
--- a/src/string.lisp
+++ b/src/string.lisp
@@ -53,3 +53,16 @@
             (list g!value)
             `(aset ,g!string ,g!index ,g!value)
             `(char ,g!string ,g!index))))
+
+(defun concatenate-two (string1 string2)
+  (let* ((len1 (length string1))
+         (len2 (length string2))
+         (string (make-array (+ len1 len2) :element-type 'character))
+         (i 0))
+    (dotimes (j len1)
+      (aset string i (char string1 j))
+      (incf i))
+    (dotimes (j len2)
+      (aset string i (char string2 j))
+      (incf i))
+    string))