Tutorial by Examples: r

overflow-wrap tells a browser that it can break a line of text inside a targeted element onto multiple lines in an otherwise unbreakable place. Helpful in preventing an long string of text causing layout problems due to overflowing it's container. CSS div { width:100px; outline: 1px dash...

If static_cast is used to convert a pointer (resp. reference) to base class to a pointer (resp. reference) to derived class, but the operand does not point (resp. refer) to an object of the derived class type, the behavior is undefined. See Base to derived conversion.

c++11 The alignment requirement of a type can be queried using the alignof keyword as a unary operator. The result is a constant expression of type std::size_t, i.e., it can be evaluated at compile time. #include <iostream> int main() { std::cout << "The alignment requiremen...

Check this out: :help holy-grail

Search for :h UserGettingBored *UserGettingBored* UserGettingBored When the user presses the same key 42 times. Just kidding! :-)

if ([[dataObject objectForKey:@"yourVariable"] isEqualToString:"Hello World"]) { return YES; } else { return NO; } You can query values stored using KVC quickly and easily, without needing to retrieve or cast these as local variables.

Fixtures are initial data for the database. The most straightforward way when you have some existing data already is to use the command dumpdata ./manage.py dumpdata > databasedump.json # full database ./manage.py dumpdata myapp > databasedump.json # only 1 app ....

This method allows a command to be sent to Cmd.exe, and returns the standard output (including standard error) as a string: private static string SendCommand(string command) { var cmdOut = string.Empty; var startInfo = new ProcessStartInfo("cmd", command) { ...

C++14 C++14 allows to use auto in lambda argument auto print = [](const auto& arg) { std::cout << arg << std::endl; }; print(42); print("hello world"); That lambda is mostly equivalent to struct lambda { template <typename T> auto operator ()(const...

Asp.net is web application framework developed by Microsoft to build dynamic data-driven Web Application and WebServices. Asp.net is basically a subset of wider .NET framework. A framework is nothing but a collection of classes. In .NET Framework you can build Console application. Web Applicatio...

This is how the right fold is implemented: foldr :: (a -> b -> b) -> b -> [a] -> b foldr f z [] = z foldr f z (x:xs) = f x (foldr f z xs) -- = x `f` foldr f z xs The right fold, foldr, associates to the right. That is: foldr (+) 0 [1, 2, 3] -- is equivalen...

To create a UDF, we need to extend UDF (org.apache.hadoop.hive.ql.exec.UDF) class and implement evaluate method. Once UDF is complied and JAR is build, we need to add jar to hive context to create a temporary/permanent function. import org.apache.hadoop.hive.ql.exec.UDF; class UDFExample ex...

Given a Day, we can perform simple arithmetic and comparisons, such as adding: import Data.Time addDays 1 (fromGregorian 2000 1 1) -- 2000-01-02 addDays 1 (fromGregorian 2000 12 31) -- 2001-01-01 Subtract: addDays (-1) (fromGregorian 2000 1 1) -- 1999-12-31 addDays (-1) (fromGregorian...

[footag foo="value of 1" attribute-2="value of 2"] In wordpress admin we use pre defined shortcodes by writing the shortcode name inside square brackets and optionally adding attributes to it separating by space.

function footag_func( $atts ) { return "foo = {$atts['foo']}"; } add_shortcode( 'footag', 'footag_func' ); In plugins we can add shortcodes using the add_shortcode function. The shortcode can be used in any Wordpress page or post just by enclosing it in square brackets. [footag...

<?php echo do_shortcode("[footag foo='Hi! I am a foo output']"); ?> To print a shortcode using php use the do_shortcode function and echo the returned value.

Like Getting a result from another Activity you need to call the Fragment's method startActivityForResult(Intent intent, int requestCode). note that you should not call getActivity().startActivityForResult() as this will take the result back to the Fragment's parent Activity. Receiving the result c...

Here a simple portable way to get the current device family: /// <summary> /// All the device families /// </summary> public enum DeviceFamily { Desktop, Mobile, Iot, Xbox, } /// <summary> /// The helper to get the current device family /// </summ...

Depending on the device/release version of the system, some API may not be available. You can check which contract is supported by using ApiInformation.IsApiContractPresent() For example, this will return true on phone devices and false on the others ApiInformation.IsApiContractPresent(typeof(Cal...

This program draws some shapes and 'hello world!' and let an image go to every corner of the window. the complete code: import pygame,sys from pygame.locals import * pygame.init() FPS = 30 #frames per second setting fpsClock = pygame.time.Clock() #set up the window screen = pygame.disp...