How do I concatenate JavaScript files into one file?

<target name="concatenate" description="Concatenate all js files">
    <concat destfile="build/application.js">
        <fileset dir="src/js" includes="*.js" />
    </concat>
</target>

<target name="compress" depends="concatenate" description="Compress application.js to application-min.js">
    <apply executable="java" parallel="false">
        <filelist dir="build" files="application.js" />
        <arg line="-jar" />
        <arg path="path/to/yuicompressor-2.4.2.jar" />
        <srcfile />
        <arg line="-o" />
        <mapper type="glob" from="*.js" to="build/*-min.js" />
        <targetfile />
    </apply>
</target>

copy /B *.js compiled.js /Y

copy /A *.js compiled.js /B /Y

copy /A *.js /B compiled.js /Y

<asp:ScriptManager ID="ScriptManager1" runat="server">
        <CompositeScript>
            <Scripts>
                <asp:ScriptReference Path="~/Scripts/Script1.js" />
                <asp:ScriptReference Path="~/Scripts/Script2.js" />
                <asp:ScriptReference Path="~/Scripts/Script3.js" />
            </Scripts>
        </CompositeScript>
    </asp:ScriptManager>

type *.js > compiled.js

<groups xmlns="http://www.isdc.ro/wro">
  <group name="all">
    <css>/asset/*.css</css>
    <js>/asset/*.js</js>
  </group>
</groups>