1 files changed, 16 insertions, 0 deletions
diff --git a/p99/p21.neb b/p99/p21.neb
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+; P21 Insert an element at a given position into a list
+
+(def a (list "a" "b" "c" "d"))
+
+(func extend (lst1 lst2)
+    (reduce append lst2 lst1))
+
+(func insert-at (item lst idx)
+    (extend
+        (slice lst 1 (- idx 1))
+        (prepend (slice lst idx) item)))
+            ;(slice lst idx)
+            ;(append (slice lst 1 (- idx 1)) item)))
+
+(print (->string a))
+(print (->string (insert-at "f" a 2)))