273 lines
5 KiB
HTML
273 lines
5 KiB
HTML
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<!DOCTYPE HTML>
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<HTML LANG="en-us"
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><HEAD
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><TITLE
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>rest | Common Lisp Nova Spec</TITLE
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><META CHARSET="US-ASCII"
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><LINK REL="canonical" HREF="f_rest.html"
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><LINK REL="next" HREF="f_member.html" TYPE="text/html" TITLE="member, member-if, member-if-not"
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><LINK REL="prev" HREF="f_nthcdr.html" TYPE="text/html" TITLE="nthcdr"
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><LINK REL="up" HREF="14_2_Conses_Dictionary.html" TYPE="text/html" TITLE="14.2 Conses Dictionary"
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><LINK REL="start" HREF="index.html" TYPE="text/html" TITLE="Common Lisp Nova Spec"
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><META NAME="VIEWPORT" CONTENT="width=device-width, initial-scale=1.0"
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><LINK REL="STYLESHEET" HREF="dpans.css%3F3909942064.css"
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><SCRIPT SRC="dpans.js%3F3909942064"
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></SCRIPT
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><SCRIPT SRC="apropos.js%3F3909942064"
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></SCRIPT
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></HEAD
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><BODY
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><DIV
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><DIV CLASS="topnav"
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><DIV CLASS="breadcrumb"
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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
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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
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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
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="f_rest.html"
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>rest</A
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></SPAN
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></DIV
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><DIV CLASS="apropos"
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><DIV CLASS="apropos-io"
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><A HREF="f_nthcdr.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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><A HREF="f_member.html" CLASS="next"
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>→</A
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></DIV
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><DIV ID="apropos-res"
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></DIV
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></DIV
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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="rest"
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></SPAN
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><B
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>rest</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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>Accessor</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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>rest</B
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> <SPAN CLASS="cmssi"
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>list</SPAN
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> <SPAN CLASS="arrow"
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>→</SPAN
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> <SPAN CLASS="cmssi"
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>tail</SPAN
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></P
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><P CLASS="j"
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><B
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>(setf (rest</B
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> <SPAN CLASS="cmssi"
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>list</SPAN
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><B
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>)</B
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> <SPAN CLASS="cmssi"
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>new-tail</SPAN
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><B
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>)</B
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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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>list</VAR
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> — a <A HREF="26_1_Glossary.html#list"
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><EM CLASS="term"
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>list</EM
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></A
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>, which might be a <A HREF="26_1_Glossary.html#dotted_list"
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><EM CLASS="term"
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>dotted list</EM
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></A
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> or a <A HREF="26_1_Glossary.html#circular_list"
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><EM CLASS="term"
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>circular 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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>tail</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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></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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><A HREF="f_rest.html" CLASS="funref"
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><B
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>rest</B
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></A
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> performs the same operation as <A HREF="f_car.html" CLASS="funref"
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><B
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>cdr</B
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></A
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>, but mnemonically complements <A HREF="f_first.html" CLASS="funref"
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><B
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>first</B
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></A
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>. Specifically,</P
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><PRE CLASS="screen"
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>(rest <VAR CLASS="param"
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>list</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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> (cdr <VAR CLASS="param"
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>list</VAR
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>)
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(setf (rest <VAR CLASS="param"
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>list</VAR
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>) <VAR CLASS="param"
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>new-tail</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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> (setf (cdr <VAR CLASS="param"
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>list</VAR
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>) <VAR CLASS="param"
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>new-tail</VAR
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>)</PRE
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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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>(rest '(1 2)) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> (2)
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(rest '(1 . 2)) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> 2
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(rest '(1)) <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 *cons* '(1 . 2)) <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 . 2)
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(setf (rest *cons*) "two") <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> "two"
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*cons* <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 . "two")</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_car.html" CLASS="funref"
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><B
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>cdr</B
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></A
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>, <A HREF="f_nthcdr.html" CLASS="funref"
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><B
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>nthcdr</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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><P CLASS="j"
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><A HREF="f_rest.html" CLASS="funref"
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><B
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>rest</B
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></A
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> is often preferred stylistically over <A HREF="f_car.html" CLASS="funref"
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><B
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>cdr</B
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></A
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> when the argument is to being subjectively viewed as a <A HREF="26_1_Glossary.html#list"
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><EM CLASS="term"
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>list</EM
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></A
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> rather than as a <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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>.</P
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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_nthcdr.html" CLASS="prev"
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>←</A
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><A HREF="f_member.html" CLASS="next"
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>→</A
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></DIV
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><DIV CLASS="trail"
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>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
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></DIV
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></DIV
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><SCRIPT
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>domReady();</SCRIPT
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></BODY
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></HTML
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>
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