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2dup ( x y -- x y x y )
Factor handbook
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Shuffle words
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dup ( x -- x x )
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3dup ( x y z -- x y z x y z )
Vocabulary
kernel
Word description
Shuffle word. Rearranges the top of the datastack as indicated in the stack effect pattern.
Definition
IN:
kernel
PRIMITIVE:
2dup
( x y -- x y x y )