<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--Rendered using the Haskell Html Library v0.2--> <HTML ><HEAD ><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" ><TITLE >Data.Map.Utils</TITLE ><LINK HREF="haddock.css" REL="stylesheet" TYPE="text/css" ><SCRIPT SRC="haddock-util.js" TYPE="text/javascript" ></SCRIPT ><SCRIPT TYPE="text/javascript" >window.onload = function () {setSynopsis("mini_Data-Map-Utils.html")};</SCRIPT ></HEAD ><BODY ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="topbar" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD ><IMG SRC="haskell_icon.gif" WIDTH="16" HEIGHT="16" ALT=" " ></TD ><TD CLASS="title" >MissingH-1.1.0.3: Large utility library</TD ><TD CLASS="topbut" ><A HREF="src/Data-Map-Utils.html" >Source code</A ></TD ><TD CLASS="topbut" ><A HREF="index.html" >Contents</A ></TD ><TD CLASS="topbut" ><A HREF="doc-index.html" >Index</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="modulebar" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD ><FONT SIZE="6" >Data.Map.Utils</FONT ></TD ><TD ALIGN="right" ><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="infohead" >Portability</TD ><TD CLASS="infoval" >portable</TD ></TR ><TR ><TD CLASS="infohead" >Stability</TD ><TD CLASS="infoval" >provisional</TD ></TR ><TR ><TD CLASS="infohead" >Maintainer</TD ><TD CLASS="infoval" >John Goerzen <jgoerzen@complete.org> </TD ></TR ></TABLE ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="section4" ><B >Contents</B ></TD ></TR ><TR ><TD ><DL ><DT ><A HREF="#1" >Basic Utilities </A ></DT ><DT ><A HREF="#2" >Conversions </A ></DT ></DL ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" >Description</TD ></TR ><TR ><TD CLASS="doc" ><P >This module provides various helpful utilities for dealing with Data.Maps. </P ><P >Written by John Goerzen, jgoerzen@complete.org </P ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" >Synopsis</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="#v%3AflipM" >flipM</A > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > key, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > val) => <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > key val -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > val [key]</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AflippedLookupM" >flippedLookupM</A > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > val, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > key) => val -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > key val -> [key]</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AforceLookupM" >forceLookupM</A > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > key, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > key) => <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> key -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > key elt -> elt</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AstrToM" >strToM</A > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead" >Read</A > a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead" >Read</A > b, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > a) => <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > a b</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AstrFromM" >strFromM</A > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > b, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > a) => <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > a b -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" ><A NAME="1" ><A NAME="1" >Basic Utilities </A ></A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:flipM" ><A NAME="v%3AflipM" ></A ></A ><B >flipM</B > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > key, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > val) => <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > key val -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > val [key]</TD ><TD CLASS="declbut" ><A HREF="src/Data-Map-Utils.html#flipM" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Flips a Map. See <TT ><A HREF="Data-List-Utils.html#v%3AflipAL" >flipAL</A ></TT > for more on the similar function for lists. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:flippedLookupM" ><A NAME="v%3AflippedLookupM" ></A ></A ><B >flippedLookupM</B > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > val, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > key) => val -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > key val -> [key]</TD ><TD CLASS="declbut" ><A HREF="src/Data-Map-Utils.html#flippedLookupM" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Returns a list of all keys in the Map whose value matches the parameter. If the value does not occur in the Map, the empty list is returned. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:forceLookupM" ><A NAME="v%3AforceLookupM" ></A ></A ><B >forceLookupM</B > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > key, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > key) => <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> key -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > key elt -> elt</TD ><TD CLASS="declbut" ><A HREF="src/Data-Map-Utils.html#forceLookupM" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Performs a lookup, and raises an exception (with an error message prepended with the given string) if the key could not be found. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" ><A NAME="2" ><A NAME="2" >Conversions </A ></A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:strToM" ><A NAME="v%3AstrToM" ></A ></A ><B >strToM</B > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead" >Read</A > a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead" >Read</A > b, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > a) => <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > a b</TD ><TD CLASS="declbut" ><A HREF="src/Data-Map-Utils.html#strToM" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" ><P >Converts a String into a String, String Map. See <TT ><A HREF="Data-List-Utils.html#v%3AstrToAL" >strToAL</A ></TT > for more on the similar function for association lists. </P ><P >This implementation is simple: </P ><PRE >strToM = Data.Map.fromList . strToAL </PRE ><P >This function is designed to work with Map String String objects, but may work with other key/value combinations if they have simple representations. </P ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:strFromM" ><A NAME="v%3AstrFromM" ></A ></A ><B >strFromM</B > :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > b, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > a) => <A HREF="/usr/share/doc/ghc/html/libraries/containers-0.3.0.0/Data-Map.html#t%3AMap" >Map</A > a b -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A ></TD ><TD CLASS="declbut" ><A HREF="src/Data-Map-Utils.html#strFromM" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" ><P >Converts a String, String Map into a string representation. See <TT ><A HREF="Data-List-Utils.html#v%3AstrFromAL" >strFromAL</A ></TT > for more on the similar function for association lists. This implementation is simple: </P ><PRE >strFromM = strFromAL . Data.Map.toList </PRE ><P >This function is designed to work with Map String String objects, but may also work with other objects with simple representations. </P ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="botbar" >Produced by <A HREF="http://www.haskell.org/haddock/" >Haddock</A > version 2.6.1</TD ></TR ></TABLE ></BODY ></HTML >