apply -- r7rs Definition

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Kind

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procedure;

Implemented by

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• apply (from vonuvoli);

Procedure signature

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Procedure variants:

• ((procedure-0) -> (any))
  • input: a value of type procedure-0;
  • output: a value of type any;
• ((procedure &variadic any &trailing list-proper) -> (any))
  • inputs:
    • a value of type procedure;
    • (variadic) a value of type any;
    • (variadic -- none, or any number of times;)
    • (trailing) a value of type list-proper;
  • output: a value of type any;

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(apply proc arg_1 ... args)

The apply procedure calls proc with the elements of the list (append (list arg_1 ...) args) as the actual arguments.

(apply + (list 3 4))              ===>  7

(define compose
  (lambda (f g)
    (lambda args
      (f (apply g args)))))

((compose sqrt *) 12 75)              ===>  30

---

The text herein was sourced and adapted as described in the "R7RS attribution of various text snippets" appendix.

Referenced-types

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• procedure-0;
• any;
• procedure;
• list-proper;