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What exactly do “u” and “r” string flags do, and what are raw string literals?
...literal) -- no "escape sequences" to represent newlines, tabs, backspaces, form-feeds, and so on. In normal string literals, each backslash must be doubled up to avoid being taken as the start of an escape sequence.
This syntax variant exists mostly because the syntax of regular expression pattern...
CORS - What is the motivation behind introducing preflight requests?
...anism. Yes these services could already be abused by a malicious or non-conforming user agent (and CORS does nothing to change this), but in a world with CORS the preflight mechanism provides an extra 'sanity check' so that clients and servers don't break because the underlying rules of the web have...
How to determine the encoding of text?
...language in text files. It is excellent for identifying various container formats, though you sometimes have to know what it means ("Microsoft Office document" could mean an Outlook message, etc).
– tripleee
Mar 6 '15 at 7:15
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URL Encoding using C#
...hen replace, but this gets far more complex, as you will have to have some form of state machine (switch ... case, for example) to replace with the correct characters. Since UrlEncode does this up front, it is rather easy.
As for Linux versus windows, there are some characters that are acceptable i...
The order of elements in Dictionary
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How do I serialize an object and save it to a file in Android?
...ble to serialize and deserialize. In my case the class name is CreateResumeForm. You should change it to your own class name. Android interface Serializable is not sufficient to save your objects to the file, it only creates streams.
// Constant with a file name
public static String fileName = "cr...
Checking for NULL pointer in C/C++ [closed]
... contributor is trying to enforce that all NULL checks on pointers be performed in the following manner:
14 Answers
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Difference between Inheritance and Composition
...rectly), and could lead to some confusion.
Interface implementation is a form of inheritance... when you implement an interface, you're not only inheriting all the constants, you are committing your object to be of the type specified by the interface; it's still an "is-a" relationship. If a car im...
Difference between angle bracket < > and double quotes “ ” while including header files in C++? [dup
...o the specification (Section 6.10.2):
A preprocessing directive of the form
# include <h-char-sequence> new-line
searches a sequence of implementation-defined places for a header identified uniquely by the specified sequence between the < and > delimiters, and causes the rep...
How to check if an object is nullable?
...s question has already been answered long ago.
To check if a type is some form of Nullable<> using reflection, you first have to convert your constructed generic type, for example Nullable<int>, into the generic type definition, Nullable<>. You can do that by using the GetGenericT...