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| -rw-r--r-- | forth.html.markdown | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/forth.html.markdown b/forth.html.markdown index 91591ac9..c61633c2 100644 --- a/forth.html.markdown +++ b/forth.html.markdown @@ -52,7 +52,7 @@ of what is written here should work elsewhere. \ And so on. -\ ------------------------------ Stack Maniulation ------------------------------ +\ ------------------------------ Stack Manipulation ------------------------------ \ Naturally, as we do so much work with the stack, we'll want some useful methods. @@ -63,10 +63,10 @@ of what is written here should work elsewhere. \ ------------------------------ More Advanced Stack Manipulation ------------------------------ -tuck \ acts like dup, except it duplicates the top item into the 3rd* position in the stack -over \ duplicate the second item to the top of the stack -n roll \ where n is a number, *move* the stack item at that position to the top of the stack -n pick \ where n is a number, *duplicate* the item at that position to the top of the stack +1 2 3 4 tuck \ duplicate the top item into the second slot: 1 2 4 3 4 ok +1 2 3 4 over \ duplicate the second item to the top: 1 2 3 4 3 ok +1 2 3 4 2 roll \ *move* the item at that position to the top: 1 3 4 2 ok +1 2 3 4 2 pick \ *duplicate* the item at that position to the top: 1 2 3 4 2 ok \ When referring to stack indexes, they are zero-based. |