<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >string-replace</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="repl-substring-list" HREF="repl-substring-list.html"><LINK REL="NEXT" TITLE="string-replace-list" HREF="string-replace-list.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="repl-substring-list.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="string-replace-list.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="STRING-REPLACE" ></A >string-replace</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN860" ></A ><H2 >Name</H2 >string-replace -- Replace all occurances of a target substring in a string</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN863" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >(string-replace string target repl)</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN866" ></A ><H2 >Description</H2 ><P >Replaces all occurances of <TT CLASS="LITERAL" >target</TT > in <TT CLASS="LITERAL" >string</TT > with <TT CLASS="LITERAL" >repl</TT >.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN872" ></A ><H2 >Author</H2 ><P >Norman Walsh, <ndw@nwalsh.com></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN875" ></A ><H2 >Source Code</H2 ><PRE CLASS="PROGRAMLISTING" >(define (string-replace string target repl) ;; Replace all occurances of a target substring in a string (let loop ((str string) (pos 0)) (if (>= pos (string-length str)) str (loop (repl-substring str target repl pos) (if (repl-substring? str target pos) (+ (string-length repl) pos) (+ 1 pos))))))</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="repl-substring-list.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-replace-list.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >repl-substring-list</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-replace-list</TD ></TR ></TABLE ></DIV ></BODY ></HTML >