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How can we match a^n b^n with Java regex?

...tion (?=…). Here is our pattern with a simple test harness: function testAll($r, $tests) { foreach ($tests as $test) { $isMatch = preg_match($r, $test, $groups); $groupsJoined = join('|', $groups); print("$test $isMatch $groupsJoined\n"); } } $tests = array('aaa', 'aaab',...
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Oracle SQL: Update a table with data from another table

... This is called a correlated update UPDATE table1 t1 SET (name, desc) = (SELECT t2.name, t2.desc FROM table2 t2 WHERE t1.id = t2.id) WHERE EXISTS ( SELECT 1 FROM table2 t2...
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How do I get textual contents from BLOB in Oracle SQL

... First of all, you may want to store text in CLOB/NCLOB columns instead of BLOB, which is designed for binary data (your query would work with a CLOB, by the way). The following query will let you see the first 32767 characters (at mo...
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Eclipse Kepler for OS X Mavericks request Java SE 6

I have just made a clean installation of OS X Mavericks , and I have downloaded Eclipse Kepler , but if I execute it, gives me this message: ...
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Is it possible to implement a Python for range loop without an iterator variable?

...llow warning. – mike rodent May 26 '15 at 6:58 add a comment  |  ...
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How to open, read, and write from serial port in C?

...en), and just copy and paste the bits needed into each project. You must call cfmakeraw on a tty obtained from tcgetattr. You cannot zero-out a struct termios, configure it, and then set the tty with tcsetattr. If you use the zero-out method, then you will experience unexplained intermittent failur...
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In a Git repository, how to properly rename a directory?

... Does it save all the log and statistics? – orezvani May 26 '14 at 2:13 24 ...
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How to use Global Variables in C#?

...er the behavior of static variables declared inside, but it doesn't look really useful. – Tommaso Belluzzo Feb 2 at 18:01 ...
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Create singleton using GCD's dispatch_once in Objective-C

... 215 This is a perfectly acceptable and thread-safe way to create an instance of your class. It may...
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FormData.append(“key”, “value”) is not working

...rmdata.get(key) and more very useful methods Original answer: What I usually do to 'debug' a FormData object, is just send it (anywhere!) and check the browser logs (eg. Chrome devtools' Network tab). You don't need a/the same Ajax framework. You don't need any details. Just send it: var xhr = ...