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<TITLE>常數</TITLE>
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<B><FONT FACE="宋體" LANG="ZH-CN" SIZE=5><P ALIGN="JUSTIFY">常數</P>
</B></FONT><FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">下面的特殊字符用于在常規表達式中創建用于匹配的模板。同時參考RegExp及常規表達式對象。</P></FONT>
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<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">標明下一個特殊字符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">^</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一行或輸入的開始。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">$</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一行或輸入的結尾。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">*</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配下面的字符大于或等于0次。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">+</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配下面的字符大于或等于1次。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">?</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配下面的字符0次或1次。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT SIZE=3><P ALIGN="JUSTIFY">‘</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配任何的單個字符，除了新行符外。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">(pattern)</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配pattern并且能記住這個匹配。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">x|y</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配x或y。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">{n}</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配恰好n次。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">{n,}</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配至少n次。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">{n,m}</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配至少n次，至多m次。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">[xyz]</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配括號內的任意字符（串〕。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">[-xyz]</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配不在括號內的字符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\b</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配單詞的邊界。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\B</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配單詞的非邊界。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\d</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個數字字符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\D</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個非數字字符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\f</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個換格式符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\n</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個換行符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\r</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個回車符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\s</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個空格符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\S</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配任意非空格符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\t</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個table符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\v</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配一個垂直制表符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\w</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配任何包括下劃線符在內的單詞符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\W</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配任何非單詞符。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">\num</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配正整數num。</FONT></TD>
</TR>
<TR><TD WIDTH="33%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">/n/</FONT></TD>
<TD WIDTH="67%" VALIGN="TOP">
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY">匹配八進制，十六進制，十進制的escape值。</FONT></TD>
</TR>
</TABLE>
<FONT FACE="宋體" LANG="ZH-CN" SIZE=3><P ALIGN="JUSTIFY"> </P>
<P ALIGN="JUSTIFY"> </P></FONT></BODY>
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