peek-back ( deque -- obj )
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Vocabulary
deques

Inputs

deque

a deque

Outputs

obj

an object

Word description
Returns the object at the back of the deque.

Errors
Throws an error if the deque is empty.

Definition

USING: kernel ;

IN: deques

: peek-back ( deque -- obj )
    peek-back* [ drop empty-deque ] unless ; inline