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281 lines
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5.3 KiB
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<!DOCTYPE HTML>
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<HTML LANG="en-us"
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>acons | Common Lisp Nova Spec</TITLE
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><SPAN CLASS="breadcrumb-item"
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><A HREF="index.html"
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>Common Lisp Nova Spec</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="14_Conses.html"
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>14. Conses</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="14_2_Conses_Dictionary.html"
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>14.2 Conses Dictionary</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="f_acons.html"
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>acons</A
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><A HREF="f_mapc.html" CLASS="prev"
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>←</A
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><SPAN ID="apropos-label"
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>Apropos </SPAN
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><INPUT ID="apropos" AUTOFOCUS="AUTOFOCUS" PLACEHOLDER="Type here to search" ONINPUT="aproposInput(this);" ONKEYUP="aproposKeyup(event);" ONCHANGE="aproposChange(this);" ONFOCUS="aproposFocus(this);" ONFOCUSOUT="aproposFocusout(this);"
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><DIV ID="apropos-res"
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></DIV
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><DIV CLASS="matter"
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><DIV CLASS="com"
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><DIV CLASS="begincom"
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><HR
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><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
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><TR
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><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
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><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="acons"
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></SPAN
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><B
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>acons</B
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></TD
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><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
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><I
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>Function</I
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></TD
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></TR
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></TABLE
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><HR
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></DIV
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><UL CLASS="subtoc"
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></UL
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><DL
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><DT
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><B
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>Syntax</B
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></DT
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><DD
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><P CLASS="j"
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><B
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>acons</B
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> <SPAN CLASS="cmssi"
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>key</SPAN
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> <SPAN CLASS="cmssi"
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>datum</SPAN
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> <SPAN CLASS="cmssi"
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>alist</SPAN
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> <SPAN CLASS="arrow"
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>→</SPAN
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> <SPAN CLASS="cmssi"
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>new-alist</SPAN
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></P
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></DD
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><DT
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><B
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>Arguments and Values</B
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></DT
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><DD
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><P CLASS="j"
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><VAR CLASS="param"
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>key</VAR
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> — an <A HREF="26_1_Glossary.html#object"
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><EM CLASS="term"
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>object</EM
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></A
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>. </P
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><P CLASS="j"
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><VAR CLASS="param"
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>datum</VAR
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> — an <A HREF="26_1_Glossary.html#object"
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><EM CLASS="term"
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>object</EM
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></A
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>. </P
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><P CLASS="j"
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><VAR CLASS="param"
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>alist</VAR
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> — an <A HREF="26_1_Glossary.html#association_list"
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><EM CLASS="term"
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>association list</EM
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></A
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>. </P
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><P CLASS="j"
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><VAR CLASS="param"
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>new-alist</VAR
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> — an <A HREF="26_1_Glossary.html#association_list"
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><EM CLASS="term"
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>association list</EM
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></A
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>.</P
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></DD
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><DT
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><B
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>Description</B
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></DT
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><DD
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><P CLASS="j"
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>Creates a <A HREF="26_1_Glossary.html#fresh"
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><EM CLASS="term"
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>fresh</EM
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></A
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> <A HREF="26_1_Glossary.html#cons"
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><EM CLASS="term"
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>cons</EM
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></A
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>, the <A HREF="26_1_Glossary.html#cdr"
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><EM CLASS="term"
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>cdr</EM
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></A
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> of which is <VAR CLASS="param"
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>alist</VAR
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> and the <A HREF="26_1_Glossary.html#car"
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><EM CLASS="term"
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>car</EM
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></A
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> of which is another <A HREF="26_1_Glossary.html#fresh"
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><EM CLASS="term"
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>fresh</EM
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></A
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> <A HREF="26_1_Glossary.html#cons"
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><EM CLASS="term"
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>cons</EM
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></A
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>, the <A HREF="26_1_Glossary.html#car"
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><EM CLASS="term"
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>car</EM
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></A
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> of which is <VAR CLASS="param"
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>key</VAR
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> and the <A HREF="26_1_Glossary.html#cdr"
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><EM CLASS="term"
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>cdr</EM
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></A
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> of which is <VAR CLASS="param"
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>datum</VAR
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>.</P
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></DD
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><DT
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><B
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>Examples</B
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></DT
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><DD
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><PRE CLASS="screen"
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>(setq alist '()) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> NIL
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(acons 1 "one" alist) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> ((1 . "one"))
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alist <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> NIL
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(setq alist (acons 1 "one" (acons 2 "two" alist))) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> ((1 . "one") (2 . "two"))
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(assoc 1 alist) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> (1 . "one")
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(setq alist (acons 1 "uno" alist)) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> ((1 . "uno") (1 . "one") (2 . "two"))
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(assoc 1 alist) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> (1 . "uno")</PRE
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></DD
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><DT
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><B
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>See Also</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="f_assoc.html" CLASS="funref"
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><B
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>assoc</B
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></A
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>, <A HREF="f_pairlis.html" CLASS="funref"
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><B
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>pairlis</B
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></A
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></P
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></DD
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><DT
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><B
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>Notes</B
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></DT
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><DD
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><PRE CLASS="screen"
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>(acons <VAR CLASS="param"
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>key</VAR
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> <VAR CLASS="param"
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>datum</VAR
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> <VAR CLASS="param"
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>alist</VAR
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>) <SPAN CLASS="cmsy"
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><SPAN STYLE="font-size:16px;vertical-align:-2px"
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>≡</SPAN
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></SPAN
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> (cons (cons <VAR CLASS="param"
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>key</VAR
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> <VAR CLASS="param"
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>datum</VAR
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>) <VAR CLASS="param"
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>alist</VAR
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>)</PRE
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></DD
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></DL
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></DIV
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></DIV
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><DIV CLASS="footer"
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><DIV CLASS="btmnav"
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><A HREF="f_mapc.html" CLASS="prev"
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>←</A
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>→</A
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><DIV CLASS="trail"
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>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
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