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Practical Common Lisp130 LOOP's hash table iteration is typically implemented on top of a more primitive form, WITH-HASH-TABLE-ITERATOR, that you don't need to worry about; it was added to the language specifically to support implementing things such as LOOP and is of little use unless you need to write completely new control constructs for iterating over hash tables. 131 Adapted from The Matrix ( 132 CONS was originally short for the verb construct. 133 When the place given to SETF is a CAR or CDR, it expands into a call to the function RPLACA or RPLACD; some old-school Lispers—the same ones who still use SETQ—will still use RPLACA and RPLACD directly, but modern style is to use SETF of CAR or CDR. 134 Typically, simple objects such as numbers are drawn within the appropriate box, and more complex objects will be drawn outside the box with an arrow from the box indicating the reference ...» | Код для вставки книги в блог HTML
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