Tutorial by Examples: t

In C++, void* cannot be implicitly converted to T* where T is an object type. Instead, static_cast should be used to perform the conversion explicitly. If the operand actually points to a T object, the result points to that object. Otherwise, the result is unspecified. C++11 Even if the operand do...

Generally execute() command is used for fire and forget calls (without need of analyzing the result) and submit() command is used for analyzing the result of Future object. We should be aware of key difference of Exception Handling mechanisms between these two commands. Exceptions from submit() ar...

C++14 C++14 introduced a standard way of deprecating functions via attributes. [[deprecated]] can be used to indicate that a function is deprecated. [[deprecated("reason")]] allows adding a specific reason which can be shown by the compiler. void function(std::unique_ptr<A> &&a...

Within a member function of a class, the keyword this is a pointer to the instance of the class on which the function was called. this cannot be used in a static member function. struct S { int x; S& operator=(const S& other) { x = other.x; // return a reference ...

Thread-local storage can be created using the thread_local keyword. A variable declared with the thread_local specifier is said to have thread storage duration. Each thread in a program has its own copy of each thread-local variable. A thread-local variable with function (local) scope will be in...

Cross-site request forgery, also known as one-click attack or session riding and abbreviated as CSRF or XSRF, is a type of malicious exploit of a website where unauthorized commands are transmitted from a user that the website trusts. Learn more To enable CSRF protection, add the CsrfViewMid...

When throw occurs in an expression with an operand, its effect is to throw an exception, which is a copy of the operand. void print_asterisks(int count) { if (count < 0) { throw std::invalid_argument("count cannot be negative!"); } while (count--) { putchar(...

Detailed instructions on getting kettle set up or installed.

First, add the HTML File to your Project (If you are asked to choose options for adding the file, select Copy items if needed) The following line of code loads the content of the HTML file into the webView webView.loadRequest(NSURLRequest(URL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForRe...

Members of objects or classes can be accessed using the object operator (->) and the class operator (::). class MyClass { public $a = 1; public static $b = 2; const C = 3; public function d() { return 4; } public static function e() { return 5; } } $object = new MyCl...

Although package:listenv implements a list-like interface to environments, its performance relative to environments for hash-like purposes is poor on hash retrieval. However, if the indexes are numeric, it can be quite fast on retrieval. However, they have other advantages, e.g. compatibility with ...

Python3 - sudo pip3 install tornado Python2 - sudo pip install tornado Packages which will are optional but recommended to install alongside Tornado : concurrent.futures pycurl pycares Twisted monotonic or monotime

$params = @{ Uri = "https://your.hipchat.com/v2/room/934419/notification?auth_token=???" Method = "POST" Body = @{ color = 'yellow' message = "This is a test message!" notify = $false message_format = "text" ...

#include <iostream> #include <string> int main() { const char * C_String = "This is a line of text w"; const char * C_Problem_String = "This is a line of text ኚ"; std::string Std_String("This is a second line of text w"); std::string...

display: inline-block; The display property with the value of inline-block is not supported by Internet Explorer 6 and 7. A work-around for this is: zoom: 1; *display: inline; The zoom property triggers the hasLayout feature of elements, and it is available only in Internet Explorer. The *di...

C99 Since C99 the C library has a set of safe conversion functions that interpret a string as a number. Their names are of the form strtoX, where X is one of l, ul, d, etc to determine the target type of the conversion double strtod(char const* p, char** endptr); long double strtold(char const* p...

What is .postMessage(), when and why do we use it .postMessage() method is a way to safely allow communication between cross-origin scripts. Normally, two different pages, can only directly communicate with each other using JavaScript when they are under the same origin, even if one of them is emb...

The keyword try is followed by a block, or by a constructor initializer list and then a block (see here). The try block is followed by one or more catch blocks. If an exception propagates out of the try block, each of the corresponding catch blocks after the try block has the opportunity to handle t...

Official documentation: http://erlang.org/doc/tutorial/nif.html NIFs were introduced in Erlang/OTP R13B03 as an experimental feature. The purpose is to allow calling C-code from inside Erlang code. NIFs are implemented in C instead of Erlang, but they appear as any other functions in the scope of ...

Here is a very simple example to illustrate how to write a NIF. Directory structure: nif_test ├── c_src │   ├── Makefile │   └── nif_test.c ├── rebar.config └── src ├── nif_test.app.src └── nif_test.erl This structure can be easily initialized using Rebar3: $ rebar3 new lib nif_...