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<DIV><FONT face=Verdana color=#0000ff size=2>Yes, what
I wanted was to use (?!...), (?=...) or (?<=...) and so on to
resolve this.</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>I believe the Power of perl regex
expression.</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>Thank you for the helping of
Havel Zhang and Wanliyou :-)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>Yang.liana</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>Aug/24/2006</FONT></DIV>
<DIV><FONT face=Verdana size=2>
<HR>
</FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>发件人：</STRONG> Havel
Zhang</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>发送时间：</STRONG>
2006-08-24 13:19:18</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>收件人：</STRONG>
china-pm@pm.org</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>抄送：</STRONG> </FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>主题：</STRONG> Re: [PerlChina] wanna
a regex expression</FONT></FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2>
<DIV>hi wanliyou:</DIV>
<DIV> don't set it as global, may ignore the last replacement.</DIV>
<DIV>yang wang to change '<FONT color=#0000ff>how are you today ? "are you ok?"
you are welcome!'</FONT>
<DIV><FONT face=Verdana color=#0000ff size=2> to
' how are hello today? "are you ok?" hello are welcome!'</FONT></DIV>
<DIV><FONT style="BACKGROUND-COLOR: #ffffff" face=Verdana color=#000000
size=2>if you not using global, the last 'you' will be ignored.</FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2>Havel Zhang</FONT></DIV><BR><BR> </DIV>
<DIV><SPAN class=gmail_quote>On 8/24/06, <B class=gmail_sendername>卍刕卍</B>
<<A href="mailto:wanliyou@gmail.com">wanliyou@gmail.com</A>> wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV>~s# # #g<BR><BR>~s# # #<BR><BR>Don't set it as global may help</DIV>
<DIV><SPAN class=e id=q_10d3dff1f180a958_1><BR><BR>
<DIV><SPAN class=gmail_quote>On 8/23/06, <B class=gmail_sendername>Havel
Zhang</B> <<A onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:havel.zhang@gmail.com" target=_blank>havel.zhang@gmail.com
</A>> wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV>
<DIV><FONT face="trebuchet ms">hi yang:</FONT></DIV>
<DIV><BR><FONT face="trebuchet ms"> you can using (?!...)
regex extension solve this problem. like
follows:<BR>#---------------------<BR>$a = 'how are you today ? "are you
ok?" you are welcome!';<BR>$a =~ s/you(?!\sok\?)/hello/ig; <BR>print $a
."\n";<BR>#-------------------</FONT></DIV>
<DIV><FONT face="trebuchet ms">Outputs:</FONT></DIV></DIV>
<DIV><SPAN>
<DIV><FONT face="trebuchet ms">how are hello today ? "are you ok?" hello are
welcome!</FONT></DIV></SPAN></DIV>
<DIV>
<DIV><FONT face="trebuchet ms">#-------------------</FONT></DIV>
<DIV><FONT face="trebuchet ms"></FONT> </DIV>
<DIV><FONT face="trebuchet ms"></FONT> </DIV>
<DIV><FONT face="trebuchet ms">other regEx extensions:</FONT></DIV>
<DIV><BR><FONT face="trebuchet ms">(?= ... ) if match ahead
successfully, return true. <BR>(?! ... ) if match ahead failed,
return true.<BR>(?<= ...) if match backwards successfully, return
true.</FONT></DIV>
<DIV><FONT face="trebuchet ms">(?<! ... ) if match backwards failed,
return true.<BR><BR>Good, luck. :)</FONT></DIV>
<DIV><FONT face="trebuchet ms"></FONT> </DIV>
<DIV><FONT face="trebuchet ms">Havel Zhang</FONT></DIV>
<DIV> </DIV>
<DIV></DIV>
<DIV><SPAN><SPAN class=gmail_quote>On 8/23/06, <B
class=gmail_sendername>杨晓亮</B> <<A
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:yang.liana@gmail.com" target=_blank> yang.liana@gmail.com</A>
> wrote: </SPAN></SPAN></DIV>
<DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid"></BLOCKQUOTE></DIV>
<DIV><SPAN>
<DIV>
<DIV>
<DIV><FONT face=Verdana><FONT size=2>
<DIV><FONT face=Verdana color=#0000ff size=2> Hi,
all!</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>
suppose a src string like this: how are you today ? "are you ok?" you are
welcome!</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2> I want
this string to be : how are hello
today? "are you ok?" hello are welcome!</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>
</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2> I want
to use just a regex express to do it. but i cant prevent from "are you ok?"
being changed to be "are hello ok?".</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2> I
want to use the *Look ahead* or *Look behind* to solve it. can I
?</FONT></DIV>
<DIV><FONT face=Verdana color=#000000 size=2></FONT> </DIV>
<DIV>Yang.liana</DIV>
<DIV>Aug/23/2006</DIV></FONT></FONT></DIV></DIV></DIV><BR></SPAN></DIV>
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<DIV><SPAN><BR><BR clear=all><BR>-- <BR>真理使你自由
</SPAN></DIV><BR>_______________________________________________<BR>China-pm
mailing list<BR><A onclick="return top.js.OpenExtLink(window,event,this)"
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clear=all><BR>-- <BR></SPAN></DIV>
<DIV>--==Best Regards From WanLi==--
</DIV><BR>_______________________________________________<BR>China-pm mailing
list<BR><A onclick="return top.js.OpenExtLink(window,event,this)"
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clear=all><BR>-- <BR>真理使你自由 </FONT></DIV></BODY></HTML>