65 lines
4.5 KiB
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65 lines
4.5 KiB
HTML
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<TITLE>CLHS: Function COPY-SEQ</TITLE>
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<A NAME="copy-seq"><I>Function</I> <B>COPY-SEQ</B></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>copy-seq</B> <I>sequence</I> => <I>copied-sequence</I><P>
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<P>
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<P><B>Arguments and Values:</B><P>
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<P>
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<I>sequence</I>---a <A REL=DEFINITION HREF="26_glo_p.htm#proper_sequence"><I>proper sequence</I></A>. <P>
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<I>copied-sequence</I>---a <A REL=DEFINITION HREF="26_glo_p.htm#proper_sequence"><I>proper sequence</I></A>. <P>
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<P><B>Description:</B><P>
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<P>
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Creates a copy of <I>sequence</I>. The <A REL=DEFINITION HREF="26_glo_e.htm#element"><I>elements</I></A> of the new <A REL=DEFINITION HREF="26_glo_s.htm#sequence"><I>sequence</I></A> are the <A REL=DEFINITION HREF="26_glo_s.htm#same"><I>same</I></A> as the corresponding <A REL=DEFINITION HREF="26_glo_e.htm#element"><I>elements</I></A> of the given <I>sequence</I>. <P>
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If <I>sequence</I> is a <A REL=DEFINITION HREF="26_glo_v.htm#vector"><I>vector</I></A>, the result is a <A REL=DEFINITION HREF="26_glo_f.htm#fresh"><I>fresh</I></A> <A REL=DEFINITION HREF="26_glo_s.htm#simple_array"><I>simple array</I></A> of <A REL=DEFINITION HREF="26_glo_r.htm#rank"><I>rank</I></A> one that has the same <A REL=DEFINITION HREF="26_glo_a.htm#actual_array_element_type"><I>actual array element type</I></A> as <I>sequence</I>. If <I>sequence</I> is a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A>, the result is a <A REL=DEFINITION HREF="26_glo_f.htm#fresh"><I>fresh</I></A> <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A>. <P>
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<P><B>Examples:</B><P>
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<PRE>
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(setq str "a string") => "a string"
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(equalp str (copy-seq str)) => <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
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(eql str (copy-seq str)) => <A REL=DEFINITION HREF="26_glo_f.htm#false">false</A>
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</PRE>
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</TT> <P>
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<P><B>Side Effects:</B> None.
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<P>
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<P><B>Affected By:</B> None.
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<P>
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<P><B>Exceptional Situations:</B><P>
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<P>
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Should be prepared to signal an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_tp_err.htm#type-error"><B>type-error</B></A> if <I>sequence</I> is not a <A REL=DEFINITION HREF="26_glo_p.htm#proper_sequence"><I>proper sequence</I></A>. <P>
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<P><B>See Also:</B><P>
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<P>
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<A REL=DEFINITION HREF="f_cp_lis.htm#copy-list"><B>copy-list</B></A> <P>
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<P><B>Notes:</B><P>
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<P>
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From a functional standpoint,
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<PRE>
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(copy-seq x) == (subseq x 0)
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</PRE>
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</TT> However, the programmer intent is typically very different in these two cases. <P>
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