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Why do we need C Unions?
...s are often used to convert between the binary representations of integers and floats:
union
{
int i;
float f;
} u;
// Convert floating-point bits to integer:
u.f = 3.14159f;
printf("As integer: %08x\n", u.i);
Although this is technically undefined behavior according to the C standard (you'r...
How to use Java property files?
...alue pairs of configuration values I want to store as Java property files, and later load and iterate through.
17 Answers
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Check for null in foreach loop
...the "lowest common denominator" codegen, which can in some cases be slower and produce more memory pressure....". Agree it requires List<T>.
– Tom
May 6 '19 at 17:18
...
Sequence contains no elements?
...
Put a breakpoint on that line, or a Debug.Print before it, in both cases and see what ID contains.
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Django: Redirect to previous page after login
...ere on SO.
The user should be able to browse the site as an anonymous user and there will be a login link on every page. When clicking on the login link the user will be taken to the login form. After a successful login the user should be taken back to the page from where he clicked the login link i...
Naming conventions: “State” versus “Status” [closed]
...Status" when naming both fields such as "Foo.currentState" vs "Foo.status" and types, like "enum FooState" vs "enum FooStatus". Is there a convention discussed out there? Should we only use one? If so which one, and if not, how should we choose?
...
How do I find out which process is locking a file using .NET?
I've seen several of answers about using Handle or Process Monitor , but I would like to be able to find out in my own code (C#)
which process is locking a file.
...
HTML: How to limit file upload to be only images?
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HTML5 File input has accept attribute and also multiple attribute. By using multiple attribute you can upload multiple images in an instance.
<input type="file" multiple accept='image/*'>
You can also limit multiple mime types.
<input type="file" mul...
Remove a string from the beginning of a string
...str($str, strlen($prefix));
}
Takes: 0.0369 ms (0.000,036,954 seconds)
And with:
$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
$str = preg_replace('/^' . preg_quote($prefix, '/') . '/', '', $str);
Takes: 0.1749 ms (0.000,174,999 seconds) the 1st run (compiling), and 0.0510 ms (0.000,051,...
How can I open multiple files using “with open” in Python?
...
Just replace and with , and you're done:
try:
with open('a', 'w') as a, open('b', 'w') as b:
do_something()
except IOError as e:
print 'Operation failed: %s' % e.strerror
...