Sophie: docbook-style-dsssl-doc-1.79-16.mga7 noarch

docbook-style-dsssl-doc-1.79-16.mga7.noarch.rpm

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>assoc</H1
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><H2
>Name</H2
>assoc&nbsp;--&nbsp;Returns the association of an object in an associative list</DIV
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>Synopsis</H2
><PRE
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>(assoc obj alist)</PRE
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><H2
>Description</H2
><P
>Given an associative list, returns the pair that has <TT
CLASS="LITERAL"
>obj</TT
> as a <TT
CLASS="LITERAL"
>car</TT
>
or <TT
CLASS="LITERAL"
>#f</TT
> if no such pair exists.</P
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><DT
>obj</DT
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><P
>The associative key to locate.</P
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>alist</DT
><DD
><P
>The associative list.</P
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><H2
>Example</H2
><P
><TT
CLASS="LITERAL"
>(assoc "a" (("a" "b") ("c" "d")))</TT
> returns  <TT
CLASS="LITERAL"
>("a" "b")</TT
></P
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><A
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><H2
>Author</H2
><P
>Norman Walsh, &lt;ndw@nwalsh.com&gt;</P
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><A
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></A
><H2
>Source Code</H2
><PRE
CLASS="PROGRAMLISTING"
>(define (assoc obj alist)
  ;; Returns the association of an object in an associative list
  (let loop ((al alist))
    (if (null? al)
	#f
	(if (equal? obj (car (car al)))
	    (car al)
	    (loop (cdr al))))))</PRE
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