<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >trim-string</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="DSSSL Library Reference" HREF="index.html"><LINK REL="UP" TITLE="Miscellaneous" HREF="r300.htm"><LINK REL="PREVIOUS" TITLE="system-id-filename" HREF="system-id-filename.html"><LINK REL="NEXT" TITLE="string-index" HREF="string-index.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >DSSSL Library Reference: Part of the Modular DocBook Stylesheet distribution</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="system-id-filename.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="string-index.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="TRIM-STRING" ></A >trim-string</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN1965" ></A ><H2 >Name</H2 >trim-string -- Trims the tail off of a string</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN1968" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >(trim-string str string-list)</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1971" ></A ><H2 >Description</H2 ><P >If <TT CLASS="LITERAL" >str</TT > ends with any of the strings in <TT CLASS="LITERAL" >string-list</TT >, trim that string off and return the base string. E.g., <TT CLASS="LITERAL" >(trim-string "filename.sgm" </TT >(".sgm" ".xml" ".sgml")) returns "filename".</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1977" ></A ><H2 >Author</H2 ><P >Norman Walsh, <ndw@nwalsh.com></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1980" ></A ><H2 >Source Code</H2 ><PRE CLASS="PROGRAMLISTING" >(define (trim-string str string-list) ;; Trims the tail off of a string (let ((strlen (string-length str))) (let loop ((sl string-list)) (if (null? sl) str (if (equal? (substring str (- strlen (string-length (car sl))) strlen) (car sl)) (substring str 0 (- strlen (string-length (car sl)))) (loop (cdr sl)))))))</PRE ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="system-id-filename.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="string-index.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >system-id-filename</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="r300.htm" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >string-index</TD ></TR ></TABLE ></DIV ></BODY ></HTML >