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Cannot ping AWS EC2 instance
...denied. The exception you need to add to the Security Group depends on the service you need to make available to the internet.
If it is a webserver you will need to allow access to port 80 for 0.0.0.0/0 (which means any IP address).
To allow pinging the instance you need to enable ICMP traffic.
T...
Reducing memory usage of .NET applications?
...re writing a Windows Forms application which will be running in a terminal services environment, on a shared server possibly utilized by 10, 20 or more users, then yes, you absolutely must consider memory usage. And you will need to be vigilant. The best way to address this is with good data structu...
How to check that an object is empty in PHP?
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empty doesn't actually check if an array is empty, empty($var) equivalent to (!isset($var) || !$var). You can replace your empty($arr)s with !$arr since array() == FALSE
– Timothy Zorn
Aug 20 '15 at 18:35...
Subprocess changing directory
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@The_Diver That's why cd must be implemented as internal shell command. There's no other way to do it. Internal shell commands are executed within the same process as the shell. What I meant by subshell is the shell executed for ...
How do you dynamically add elements to a ListView on Android?
Can anyone explain or suggest a tutorial to dynamically create a ListView in android?
7 Answers
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IIS7 Settings File Locations
...programs to read\write as if they were 64 bit since the windows file share service is 64 bit: \\yourservername\c$\Windows\System32\inetsrv\config
– Tim Lewis
Jun 27 '14 at 1:42
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Which .NET Dependency Injection frameworks are worth looking into? [closed]
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Beware some consider the service locator an anti-pattern, including someone who used it for some time and even wrote a library for it: blog.ploeh.dk/2010/02/03/ServiceLocatorisanAnti-Pattern
– Philippe
Sep 10 '1...
Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but
...the pointer to void * as in printf("%p", (void *)str); When printing a size_t with printf, you should use "%zu" if using the latest C standard (C99).
– Chris Young
Oct 3 '08 at 7:44
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Dependency injection through constructors or property setters?
...xceptions and might even get things wrongs and end up getting stuck with a service locator implementation.
– MeTitus
Sep 9 '16 at 14:39
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Is nested function a good approach when required by only one function? [closed]
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>>> def sum(x, y):
... def do_it():
... return x + y
... return do_it
...
>>> a = sum(1, 3)
>>> a
<function do_it at 0xb772b304>
>>> a()
4
Is this what you were looking for? It's called a closure.
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