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>set-exclusive-or, nset-exclusive-or | Common Lisp Nova Spec</TITLE
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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="set-exclusive-or, nset-exclusive-or"
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></SPAN
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><B
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>set-exclusive-or, nset-exclusive-or</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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>set-exclusive-or</B
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> <SPAN CLASS="cmssi"
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>list-1</SPAN
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> <SPAN CLASS="cmssi"
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>list-2</SPAN
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> <SPAN CLASS="cmtt"
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>&key</SPAN
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> <SPAN CLASS="cmssi"
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>key</SPAN
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> <SPAN CLASS="cmssi"
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>test</SPAN
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> <SPAN CLASS="cmssi"
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>test-not</SPAN
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> <SPAN CLASS="arrow"
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>→</SPAN
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> <SPAN CLASS="cmssi"
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>result-list</SPAN
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></P
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><P CLASS="j"
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><B
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>nset-exclusive-or</B
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> <SPAN CLASS="cmssi"
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>list-1</SPAN
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> <SPAN CLASS="cmssi"
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>list-2</SPAN
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> <SPAN CLASS="cmtt"
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>&key</SPAN
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> <SPAN CLASS="cmssi"
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>key</SPAN
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> <SPAN CLASS="cmssi"
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>test</SPAN
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> <SPAN CLASS="cmssi"
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>test-not</SPAN
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> <SPAN CLASS="arrow"
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>→</SPAN
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> <SPAN CLASS="cmssi"
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>result-list</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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>list-1</VAR
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> — a <A HREF="26_1_Glossary.html#proper_list"
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><EM CLASS="term"
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>proper 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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>list-2</VAR
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> — a <A HREF="26_1_Glossary.html#proper_list"
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><EM CLASS="term"
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>proper 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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>test</VAR
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> — a <A HREF="26_1_Glossary.html#designator"
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><EM CLASS="term"
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>designator</EM
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></A
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> for a <A HREF="26_1_Glossary.html#function"
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><EM CLASS="term"
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>function</EM
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></A
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> of two <A HREF="26_1_Glossary.html#argument"
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><EM CLASS="term"
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>arguments</EM
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></A
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> that returns a <A HREF="26_1_Glossary.html#generalized_boolean"
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><EM CLASS="term"
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>generalized boolean</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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>test-not</VAR
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> — a <A HREF="26_1_Glossary.html#designator"
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><EM CLASS="term"
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>designator</EM
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></A
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> for a <A HREF="26_1_Glossary.html#function"
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><EM CLASS="term"
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>function</EM
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></A
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> of two <A HREF="26_1_Glossary.html#argument"
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><EM CLASS="term"
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>arguments</EM
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></A
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> that returns a <A HREF="26_1_Glossary.html#generalized_boolean"
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><EM CLASS="term"
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>generalized boolean</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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>key</VAR
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> — a <A HREF="26_1_Glossary.html#designator"
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><EM CLASS="term"
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>designator</EM
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></A
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> for a <A HREF="26_1_Glossary.html#function"
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><EM CLASS="term"
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>function</EM
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></A
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> of one argument, or <SPAN CLASS="misc"
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><B
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>nil</B
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></SPAN
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>. </P
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><P CLASS="j"
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><VAR CLASS="param"
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>result-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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>.</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_set-exclusive-or.html" CLASS="funref"
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><B
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>set-exclusive-or</B
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></A
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> returns 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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> of elements that appear in exactly one of <VAR CLASS="param"
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>list-1</VAR
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> and <VAR CLASS="param"
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>list-2</VAR
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>. </P
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><P CLASS="j"
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><A HREF="f_set-exclusive-or.html" CLASS="funref"
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><B
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>nset-exclusive-or</B
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></A
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> is the <A HREF="26_1_Glossary.html#destructive"
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><EM CLASS="term"
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>destructive</EM
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></A
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> version of <A HREF="f_set-exclusive-or.html" CLASS="funref"
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><B
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>set-exclusive-or</B
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></A
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>. </P
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><P CLASS="j"
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>For all possible ordered pairs consisting of one element from <VAR CLASS="param"
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>list-1</VAR
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> and one element from <VAR CLASS="param"
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>list-2</VAR
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>, the <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:test</SPAN
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></SPAN
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> or <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:test-not</SPAN
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></SPAN
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> function is used to determine whether they <A HREF="26_1_Glossary.html#satisfy_the_test"
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><EM CLASS="term"
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>satisfy the test</EM
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></A
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>. </P
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><P CLASS="j"
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>If <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:key</SPAN
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></SPAN
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> is supplied, it is used to extract the part to be tested from the <VAR CLASS="param"
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>list-1</VAR
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> or <VAR CLASS="param"
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>list-2</VAR
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> element. The first argument to the <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:test</SPAN
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></SPAN
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> or <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:test-not</SPAN
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></SPAN
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> function is the part of an element of <VAR CLASS="param"
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>list-1</VAR
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> extracted by the <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:key</SPAN
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></SPAN
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> function (if supplied); the second argument is the part of an element of <VAR CLASS="param"
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>list-2</VAR
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> extracted by the <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:key</SPAN
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></SPAN
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> function (if supplied). If <SPAN CLASS="kwd"
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><SPAN CLASS="cmtt"
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>:key</SPAN
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></SPAN
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> is not supplied or <SPAN CLASS="misc"
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><B
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|
>nil</B
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></SPAN
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|
>, the <VAR CLASS="param"
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>list-1</VAR
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> or <VAR CLASS="param"
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>list-2</VAR
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> element is used. </P
|
|
><P CLASS="j"
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|
>The result contains precisely those elements of <VAR CLASS="param"
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>list-1</VAR
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> and <VAR CLASS="param"
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>list-2</VAR
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|
> that appear in no matching pair. </P
|
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><P CLASS="j"
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|
>The result <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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> of <A HREF="f_set-exclusive-or.html" CLASS="funref"
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><B
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>set-exclusive-or</B
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></A
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> might share storage with one of <VAR CLASS="param"
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>list-1</VAR
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> or <VAR CLASS="param"
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>list-2</VAR
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>.</P
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></DD
|
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><DT
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><B
|
|
>Examples</B
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></DT
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><DD
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><PRE CLASS="screen"
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> (setq lst1 (list 1 "a" "b")
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lst2 (list 1 "A" "b")) <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 "A" "b")
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(set-exclusive-or lst1 lst2) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> ("b" "A" "b" "a")
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(set-exclusive-or lst1 lst2 :test #'equal) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
|
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> ("A" "a")
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(set-exclusive-or lst1 lst2 :test 'equalp) <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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(nset-exclusive-or lst1 lst2) <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> ("a" "b" "A" "b")
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(setq lst1 (list (("a" . "b") ("c" . "d") ("e" . "f"))))
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> (("a" . "b") ("c" . "d") ("e" . "f"))
|
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(setq lst2 (list (("c" . "a") ("e" . "b") ("d" . "a"))))
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> (("c" . "a") ("e" . "b") ("d" . "a"))
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(nset-exclusive-or lst1 lst2 :test #'string= :key #'cdr)
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
|
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> (("c" . "d") ("e" . "f") ("c" . "a") ("d" . "a"))
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lst1 <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> (("a" . "b") ("c" . "d") ("e" . "f"))
|
|
lst2 <SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
|
|
></SPAN
|
|
> (("c" . "a") ("d" . "a"))</PRE
|
|
></DD
|
|
><DT
|
|
><B
|
|
>Side Effects</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
><A HREF="f_set-exclusive-or.html" CLASS="funref"
|
|
><B
|
|
>nset-exclusive-or</B
|
|
></A
|
|
> is permitted to modify any part, <A HREF="26_1_Glossary.html#car"
|
|
><EM CLASS="term"
|
|
>car</EM
|
|
></A
|
|
> or <A HREF="26_1_Glossary.html#cdr"
|
|
><EM CLASS="term"
|
|
>cdr</EM
|
|
></A
|
|
>, of the <A HREF="26_1_Glossary.html#list_structure"
|
|
><EM CLASS="term"
|
|
>list structure</EM
|
|
></A
|
|
> of <VAR CLASS="param"
|
|
>list-1</VAR
|
|
> or <VAR CLASS="param"
|
|
>list-2</VAR
|
|
>.</P
|
|
></DD
|
|
><DT
|
|
><B
|
|
>Exceptional Situations</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
>Should be prepared to signal an error of <A HREF="26_1_Glossary.html#type"
|
|
><EM CLASS="term"
|
|
>type</EM
|
|
></A
|
|
> <A HREF="t_type-error.html" CLASS="typeref"
|
|
><B
|
|
>type-error</B
|
|
></A
|
|
> if <VAR CLASS="param"
|
|
>list-1</VAR
|
|
> and <VAR CLASS="param"
|
|
>list-2</VAR
|
|
> are not <A HREF="26_1_Glossary.html#proper_list"
|
|
><EM CLASS="term"
|
|
>proper lists</EM
|
|
></A
|
|
>.</P
|
|
></DD
|
|
><DT
|
|
><B
|
|
>See Also</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
><A HREF="3_2_Compilation.html#sec_3_2_1" CLASS="secref"
|
|
><SPAN CLASS="cmr"
|
|
>Section</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>3.2.1</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>(Compiler</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>Terminology)</SPAN
|
|
></A
|
|
>, <A HREF="3_6_Traversal_Rules_and_Side_Effects.html#sec_3_6" CLASS="secref"
|
|
><SPAN CLASS="cmr"
|
|
>Section</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>3.6</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>(Traversal</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>Rules</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>and</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>Side</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>Effects)</SPAN
|
|
></A
|
|
></P
|
|
></DD
|
|
><DT
|
|
><B
|
|
>Notes</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
>The <SPAN CLASS="kwd"
|
|
><SPAN CLASS="cmtt"
|
|
>:test-not</SPAN
|
|
></SPAN
|
|
> parameter is deprecated. </P
|
|
><P CLASS="j"
|
|
>Since the <A HREF="f_set-exclusive-or.html" CLASS="funref"
|
|
><B
|
|
>nset-exclusive-or</B
|
|
></A
|
|
> side effect is not required, it should not be used in for-effect-only positions in portable code.</P
|
|
></DD
|
|
></DL
|
|
></DIV
|
|
></DIV
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><DIV CLASS="footer"
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