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What is the equivalent of Java's final in C#?
...e - failing to assign V or assigning V two or more times will result in an error.
C#'s readonly keyword has no such guarantee - the compiler is more than happy to leave readonly members unassigned or allow you to assign them multiple times within a constructor.
So, final and readonly (at least wit...
Why dict.get(key) instead of dict[key]?
...ever you choose it to be), whereas
dictionary["bogus"]
would raise a KeyError.
If omitted, default_value is None, such that
dictionary.get("bogus") # <-- No default specified -- defaults to None
returns None just like
dictionary.get("bogus", None)
would.
...
What is difference between functional and imperative programming languages?
Most of the mainstream languages, including object-oriented programming (OOP) languages such as C#, Visual Basic, C++, and Java were designed to primarily support imperative (procedural) programming, whereas Haskell/gofer like languages are purely functional. Can anybody elaborate on what is the dif...
How do I implement a callback in PHP?
... be called directly
$cb2 = 'ClassName::someStaticMethod';
$cb2(); // fatal error
// legacy syntax for PHP 4
$cb3 = array(&$object, 'somePublicMethod');
This is a safe way to use callable values in general:
if (is_callable($cb2)) {
// Autoloading will be invoked to load the class "ClassNa...
Pointer arithmetic for void pointer in C
... MSVC) disallow arithmetic on void*, and GCC disallows it if the -pedantic-errors flag is specified, or if the -Werror-pointer-arith flag is specified (this flag is useful if your code base must also compile with MSVC).
The C Standard Speaks
Quotes are taken from the n1256 draft.
The standard's d...
Unix command to find lines common in two files
...ve the temporary files afterwards, and cope with cleaning up in case of an error. In many scenarios, the process substitution will also be a lot quicker because you can avoid the disk I/O as long as the results fit into memory.
– tripleee
Dec 8 '17 at 5:41
...
System.Security.SecurityException when writing to Event Log
...
This answer describes the real reason behind the error. The check exists tries to enumerate the whole key. if it exists, checkExists works fine.
– DanO
Jul 29 '15 at 16:40
...
How to make a SPA SEO crawlable?
... So in web.config I add the following line to redirect these to a specific error handling controller:
<customErrors mode="On" defaultRedirect="Error">
<error statusCode="404" redirect="Error" />
</customErrors><br/>
Now, this transforms the URL to something like: http:...
How to increase font size in the Xcode editor?
...ects you have open in Xcode"? I don't know if it's expected behavior or my error, however in Xcode Version 5.1 (5B130a), I can't change fonts if there are any projects currently open.
– original_username
Mar 17 '14 at 9:07
...
What is the difference between the remap, noremap, nnoremap and vnoremap mapping commands in Vim?
...
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