Tutorial by Examples: p

HTML <input type="range"></input> CSS EffectPseudo SelectorThumbinput[type=range]::-webkit-slider-thumb, input[type=range]::-moz-range-thumb, input[type=range]::-ms-thumbTrackinput[type=range]::-webkit-slider-runnable-track, input[type=range]::-moz-range-track, input[type=...

Given the text: foo: bar I would like to replace anything following "foo: " with "baz", but I want to keep "foo: ". This could be done with a capturing group like this: s/(foo: ).*/$1baz/ Which results in the text: foo: baz Example 1 or we could use \K,...

Software needed: Arduino IDE Setup Most Arduino-compatible boards have a USB port and come with a USB cable. Plug in the Arduino using the USB cable, and start up the Arduino IDE. Arduino IDE will start with a new sketch, typically with an emtpy setup() and loop() functions. This is enough to u...

1. Install Node.js and NPM: Gulp requires Node.js and NPM, Node's package manager. Most installers include NPM with Node.js. Refer to the installation documentation or confirm it is already installed by running the following command in your terminal, npm -v // will return NPM version or error say...

Table Setup CREATE TABLE dbo.Employees ( EmployeeID INT NOT NULL PRIMARY KEY, FirstName NVARCHAR(50) NOT NULL, LastName NVARCHAR(50) NOT NULL, ManagerID INT NULL ) GO INSERT INTO Employees VALUES (101, 'Ken', 'Sánchez', NULL) INSERT INTO Employees VALUES (102, 'Keith', ...

This example comes from the official document. Suppose you have a python application using redis as backend. After writing Dockerfile, create a docker-compose.yml file like this: version: '2' services: web: build: . ports: - "5000:5000" volumes: - .:/code ...

For full description of patterns, see SimpleDateFormat reference Date now = new Date(); long timestamp = now.getTime(); SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy", Locale.US); String dateStr = sdf.format(timestamp);

Functions can modify the parameters passed to them if they are marked with the inout keyword. When passing an inout parameter to a function, the caller must add a & to the variable being passed. func updateFruit(fruit: inout Int) { fruit -= 1 } var apples = 30 // Prints "There's 3...

Floating point numbers of type real cannot have any real value. They can represent real numbers up to certain amount of decimal digits. FORTRAN 77 guaranteed two floating point types and more recent standards guarantee at least two real types. Real variables may be declared as real x double prec...

This example shows how to create a simple notification that starts an application when the user clicks it. Specify the notification's content: NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_launcher) // notification icon .se...

Switch statement make use of partial matching. let coordinates: (x: Int, y: Int, z: Int) = (3, 2, 5) switch (coordinates) { case (0, 0, 0): // 1 print("Origin") case (_, 0, 0): // 2 print("On the x-axis.") case (0, _, 0): // 3 print("On the y-axis.") ca...

iex(1)> a = 10 10 iex(2)> b = 20 20 iex(3)> a + b 30 You can get a specific row passing the index of the row: iex(4)> v(3) 30 You can also specify an index relative to the current row: iex(5)> v(-1) # Retrieves value of row (5-1) -> 4 30 iex(6)> v(-5) # Retrieves...

You can set the opacity to a certain UIColor without creating a new one using the init(red:_,green:_,blue:_,alpha:_) initializer. Swift let colorWithAlpha = UIColor.redColor().colorWithAlphaComponent(0.1) Swift 3 //In Swift Latest Version _ colorWithAlpha = UIColor.red.withAlphaComponent(0.1)...

The following code is based on the examples provided by the documentation on std::net::TcpListener. This server application will listen to incoming requests and send back all incoming data, thus acting as an "echo" server. The client application will send a small message and expect a reply...

This code example creates a TCP client, sends "Hello World" over the socket connection, and then writes the server response to the console before closing the connection. // Declare Variables string host = "stackoverflow.com"; int port = 9999; int timeout = 5000; // Create ...

public async Task<Product> GetProductAsync(string productId) { using (_db) { return await _db.QueryFirstOrDefaultAsync<Product>("usp_GetProduct", new { id = productId }, commandType: CommandType.StoredProcedure); } }

With this example, we will see how to load a color image from disk and display it using OpenCV's built-in functions. We can use the C/C++, Python or Java bindings to accomplish this. In C++: #include <opencv2/core.hpp> #include <opencv2/highgui.hpp> #include <iostream> usi...

prop_evenNumberPlusOneIsOdd :: Integer -> Property prop_evenNumberPlusOneIsOdd x = even x ==> odd (x + 1) If you want to check that a property holds given that a precondition holds, you can use the ==> operator. Note that if it's very unlikely for arbitrary inputs to match the precondit...

A try/catch block is used to catch exceptions. The code in the try section is the code that may throw an exception, and the code in the catch clause(s) handles the exception. #include <iostream> #include <string> #include <stdexcept> int main() { std::string str("foo&...

Google maintains documentation on getting started here: https://cloud.google.com/storage/docs/quickstart-console Getting ready to use GCS: Create a Google Cloud project, if you don't have one already. Enable billing for your project to allow buckets to be created. (Optional) Install the Google...