Why so many version of JDeveloper

I don't get it. I am not sure why oracle is coming up with so many version of JDeveloper. Recently I wanted to try Oracle SOA suit. SOA suit has its own version of JDeveloper. I also know there SQLDeveloper and JDeveloper with OA Framework, JDeveloper with ADF and JDeveloper with BI tools. I am sure oracle can come up with one JDeveloper which has all there features as plugins like SQLDeveloper plugin and SOA plugin etc. Life would be so easy with that.

Microsoft But it's not google attempt

Microsoft has release its new search engine called BING. Looks like with BING Microsoft has replaced all their previous search engine attempts.That includes MSN search and Live Search. BING is good. At least a lot like WEB 2.0. However Microsoft needs to give BIN a little more time to pick up. People are so used to Google that it will be a very tall order to be able to get people to use BING. However, Microsoft can use some of insights mentioned in book called "Crossing the Chasm: Marketing and Selling High-Tech Products to Mainstream Customers" (http://www.amazon.com/Crossing-Chasm-Marketing-High-Tech-Mainstream/dp/0066620023) This books shows how a new distruptive technology just like BING can get more mindshare by concentrating on Innovators. The book use term Innovators for people who like to try any new technology that comes to the market. If Microsoft can convince few good innovators, they can reach many people. Ofcourse for that Microsoft needs to use network nodes. BING is very interesting and will be very interesting to watch path Microsoft takes to reach the people. For me I will be using BING as my main search site for next 1 month.

Regular Expressions Syntax summary

Items to match a single character
Meta characters		Matches
.	Dot	Matches any one character
[….]	Character class	Matches any one character listed
[^….]	Negated character class	Matches any one character not listed
\char	Escaped character	Matches literal character
Items appended to provide “Counting” : The Quantifiers
?	question	One allowed but it is optional
*	star	Any number allowed but all are optional
+	Plus	At least one is required; additional are optional
{min, max}	Specified range	Min required , Max allowed
Items that match a position
^	Caret	Matches the position at the start of the line
$	Dollar	Matches the position at the end of the line
\<	Word boundary	Matches the position at the start of the word
\>	Word boundary	Matches the position at the end of the word
|	Alternation	Matches either expression it separates
( )	Parentheses	Limits the scope of alternation, provides the grouping for quantifier and captures for back references
\1 \2	Back references	Matches the text previously match within first , second etc.
\t	Tab character
\n	Newline character
\r	Carriage return
\s		Matches any whitespace
\S		Any thing not \s
\w		Matches any word
\W		Matches non word [^a-zA-Z0-9_]
\d		Matches any numeric digit [0-9]
\D		Any thing not \d
(?<=…)	Look behind	Successful if can match to the left
(?<!...)	Negative look behind	Successful if can not match to the left
(?=…..)	Look ahead	Success full if can match to the right
(?!....)	Negative look ahead	Successful if can not match to the right