Scieneer Common Lisp 1.3.9 online documentation kernel:data-vector-set-conditional vector index old new [Function] Atomically compare an element of vector to old and if eq then store new in the element. The original cell value is returned.
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| kernel:data-vector-set-conditional vector index old new | [Function] |
Atomically compare an element of vector to old and if eq then store new in the element. The original cell value is returned.