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61 lines
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<TITLE>A.2. Series Functions</TITLE>
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<b>Common Lisp the Language, 2nd Edition</b>
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<BR> <HR><A NAME=tex2html6062 HREF="node350.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html6060 HREF="node347.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html6054 HREF="node348.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html6064 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html6065 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html6063 HREF="node350.html"> Scanners</A>
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<B>Up:</B> <A NAME=tex2html6061 HREF="node347.html"> Series</A>
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<B> Previous:</B> <A NAME=tex2html6055 HREF="node348.html"> Introduction</A>
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<HR> <P>
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<H1><A NAME=SECTION003420000000000000000>A.2. Series Functions</A></H1>
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<P>
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<img align=bottom alt="change_begin" src="gif/change_begin.gif"><br>
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<A NAME=SERIESFSECTION>Throughout</A> this chapter the notation <tt>S<IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap44030.gif"></tt> is used to
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denote the <i>j</i>th element of the series <tt>S</tt>. As in a list or
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vector, the first element of a series has the subscript zero.
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<P>
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The <tt>#</tt> macro character syntax <tt>#Z<i>list</i></tt> denotes a series that contains
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the elements of <i>list</i>. This syntax is also used when series are printed.
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<P><pre>
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(choose-if #'symbolp #Z(a 2 b)) => #Z(a b)
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</pre><P>
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Series are self-evaluating objects and the series data type is disjoint
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from all other types.
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<P>
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<BR><b>[Type specifier]</b><BR>
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<tt>series <i>element-type</i></tt><P>The type specifier <tt>(series <i>element-type</i>)</tt>
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denotes the set of series whose elements are all
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members of the type <i>element-type</i>.
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<P>
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<BR><b>[Function]</b><BR>
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<tt>series <em>arg</em> &rest <em>args</em></tt><P>The function <tt>series</tt> returns an unbounded series that endlessly repeats the
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values of the arguments. The second example below shows the preferred
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method for constructing a bounded series.
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<P><pre>
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(series 'b 'c) => #Z(b c b c b c ...)
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(scan (list 'a 'b 'c)) => #Z(a b c)
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</pre><P>
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<br><img align=bottom alt="change_end" src="gif/change_end.gif">
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<P>
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<HR>
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<UL>
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<LI> <A NAME=tex2html6066 HREF="node350.html#SECTION003421000000000000000"> Scanners</A>
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<LI> <A NAME=tex2html6067 HREF="node351.html#SECTION003422000000000000000"> Mapping</A>
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<LI> <A NAME=tex2html6068 HREF="node352.html#SECTION003423000000000000000"> Truncation and Other Simple Transducers</A>
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<LI> <A NAME=tex2html6069 HREF="node353.html#SECTION003424000000000000000"> Conditional and Other Complex Transducers</A>
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<LI> <A NAME=tex2html6070 HREF="node354.html#SECTION003425000000000000000"> Collectors</A>
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<LI> <A NAME=tex2html6071 HREF="node355.html#SECTION003426000000000000000"> Alteration of Series</A>
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<P><ADDRESS>
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AI.Repository@cs.cmu.edu
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