first-key ( tree -- key/f )
Binary search trees

Prev:first-entry ( tree -- pair/f )
Next:last-entry ( tree -- pair/f )


Vocabulary
trees

Inputs and outputs
treea tree
key/fa pair or f


Word description
Returns the first (lowest) key in this tree, or f if the tree is empty.

See also
first-entry, last-key, last-entry

Definition