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How to create a hex dump of file containing only the hex characters without spaces in bash?
...exdump -ve '1/1 "%.2x"'
1/1 means "each format is applied once and takes one byte", and "%.2x" is the actual format string, like in printf. In this case: 2-character hexadecimal number, leading zeros if shorter.
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Right query to get the current number of connections in a PostgreSQL DB
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Those two requires aren't equivalent. The equivalent version of the first one would be:
SELECT sum(numbackends) FROM pg_stat_database;
In that case, I would expect that version to be slightly faster than the second one, simply because it has fewer rows to count. But you are not likely going to b...
How do I load a file from resource folder?
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to convert to string in one line: new String(this.getClass().getResourceAsStream("/my_file_in_resources.bzip").readAllBytes())
– prayagupd
Jun 30 at 0:46
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How to easily map c++ enums to strings
...be nice to be able to accept multiple arguments for operator[]. but sadly, one cannot do that. x[a, b] evaluate to x[b] . the (a, b) expression makes use of the comma operator. so it is equivalent to ["A"]["B"]["C"] in your code. you could change it to say [eValue1]["A"][eValu..
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Overloaded method selection based on the parameter's real type
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As mentioned before overloading resolution is performed at compile time.
Java Puzzlers has a nice example for that:
Puzzle 46: The Case of the Confusing Constructor
This puzzle presents you with two Confusing constructors. The mai...
What is syntax for selector in CSS for next element?
... the p that comes just after h1.hc-reform. Then again it might be the only one that the clear: both needs to be applied on for it to work since it simply clears the h1 float, so it's still a valid answer.
– BoltClock♦
Sep 7 '10 at 15:25
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How do I make a composite key with SQL Server Management Studio?
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So if one is a string and the other is an int, it's not possible? Doesn't seem to be...
– B. Clay Shannon
Nov 19 '13 at 23:06
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Access-Control-Allow-Origin Multiple Origin Domains?
...ry: Origin" in your response. The cache/CDN then knows that it should send one response to a request with header "Origin: foo.example.com", and a different response to a request with header "Origin: bar.example.com".
– Sean
Jan 11 '13 at 17:34
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The difference between fork(), vfork(), exec() and clone()
...ollowed by exec(), which discards the current memory map and creates a new one, it was a needless expense. Nowadays, fork() doesn't copy the memory; it's simply set as "copy on write", so fork()+exec() is just as efficient as vfork()+exec().
clone() is the syscall used by fork(). with some paramet...
What does “yield break;” do in C#?
...his syntax in MSDN: yield break , but I don't know what it does. Does anyone know?
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