9 lines
378 B
Text
9 lines
378 B
Text
preorder[a_Integer] := a;
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preorder[a_[b__]] := Flatten@{a, preorder /@ {b}};
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inorder[a_Integer] := a;
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inorder[a_[b_, c_]] := Flatten@{inorder@b, a, inorder@c};
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inorder[a_[b_]] := Flatten@{inorder@b, a}; postorder[a_Integer] := a;
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postorder[a_[b__]] := Flatten@{postorder /@ {b}, a};
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levelorder[a_] :=
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Flatten[Table[Level[a, {n}], {n, 0, Depth@a}]] /. {b_Integer[__] :>
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b};
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