September 2017 Update

Task/Exponentiation-operator/Erlang/exponentiation-operator-1.erl

@@ -1,19 +0,0 @@
-% -spec attribute is for documentation and dialyzer static analysis purposes only.
-% It does not constrain the function like a guard (when ... ).
--spec exp_int(X :: integer(), N :: non_neg_integer()) -> integer().
-
-% X ^ 0
-exp_int(X, 0) when is_integer(X) -> % is_integer guard is required, otherwise X would match anything.
-    1;
-
-% X ^ odd
-exp_int(X, N) when is_integer(X), N >= 1, N rem 2 == 1 ->
-    Part = exp_int(X, (N-1) div 2),
-    X * Part * Part;
-
-% X ^ even
-exp_int(X, N) when is_integer(X), N >= 2, N rem 2 == 0 ->
-    Part = exp_int(X, N div 2),
-    Part * Part.
-
-% X ^ negative is excluded because it would return float.

Task/Exponentiation-operator/Erlang/exponentiation-operator-2.erl

@@ -1,21 +0,0 @@
-% -spec attribute is for documentation and dialyzer static analysis purposes only.
-% It does not constrain the function like a guard (when ... ).
--spec exp_float(X :: float(), N :: integer()) -> float().
-
-% X ^ 0
-exp_float(X, 0) when is_float(X) -> % is_float guard is required, otherwise X would match anything.
-    1.0;
-
-% X ^ negative
-exp_float(X, N) when is_float(X), N < 0 ->
-    1.0 / exp_float(X, -N);
-
-% X ^ even
-exp_float(X, N) when is_float(X), N >= 1, N rem 2 == 1 ->
-    Part = exp_float(X, (N-1) div 2),
-    X * Part * Part;
-
-% X ^ odd
-exp_float(X, N) when is_float(X), N >= 2, N rem 2 == 0 ->
-    Part = exp_float(X, N div 2),
-    Part * Part.