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Constructors can be created with any kinds of arguments. public class TestClass { private String testData; public TestClass(String testData) { this.testData = testData; } } Called like this: TestClass testClass = new TestClass("Test Data"); A class can ...

Node.js package configurations are contained in a file called package.json that you can find at the root of each project. You can setup a brand new configuration file by calling: npm init That will try to read the current working directory for Git repository information (if it exists) and enviro...

HTML input validation is done automatically by the browser based on special attributes on the input element. It could partially or completely replace JavaScript input validation. This kind of validation can be circumvented by the user via specially crafted HTTP requests, so it does not replace serve...

docker run -p "8080:8080" myApp docker run -p "192.168.1.12:80:80" nginx docker run -P myApp In order to use ports on the host have been exposed in an image (via the EXPOSE Dockerfile directive, or --expose command line option for docker run), those ports need to be bound to...

main = do input <- getContents putStr input Input: This is an example sentence. And this one is, too! Output: This is an example sentence. And this one is, too! Note: This program will actually print parts of the output before all of the input has been fully read in. This m...

readFloat :: IO Float readFloat = fmap read getLine main :: IO () main = do putStr "Type the first number: " first <- readFloat putStr "Type the second number: " second <- readFloat putStrLn $ show first ++ " + " ++ show se...

A bit counter-intuitive to the way most other languages' standard I/O libraries do it, Haskell's isEOF does not require you to perform a read operation before checking for an EOF condition; the runtime will do it for you. import System.IO( isEOF ) eofTest :: Int -> IO () eofTest line = do ...

During a merge, you can pass --ours or --theirs to git checkout to take all changes for a file from one side or the other of a merge. $ git checkout --ours -- file1.txt # Use our version of file1, delete all their changes $ git checkout --theirs -- file2.txt # Use their version of file2, delete ...

$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 2bc9b1988080 redis "docker-entrypoint.sh" 2 weeks ago Up 2 hours 0.0.0.0:6379->6379/tcp eleph...

Docker commands which take the name of a container accept three different forms: TypeExampleFull UUID9cc69f11a0f76073e87f25cb6eaf0e079fbfbd1bc47c063bcd25ed3722a8cc4aShort UUID9cc69f11a0f7Nameberserk_wozniak Use docker ps to view these values for the containers on your system. The UUID is generat...

To stop a running container: docker stop <container> [<container>...] This will send the main process in the container a SIGTERM, followed by a SIGKILL if it doesn't stop within the grace period. The name of each container is printed as it stops. To start a container which is stoppe...

In Google Chrome, you can pause execution without needing to place breakpoints. Pause on Exception: While this button is toggled on, if your program hits an unhandled exception, the program will pause as if it had hit a breakpoint. The button can be found near Execution Controls and is useful for ...

To install MongoDB, follow the steps below: For Mac OS: There are two options for Mac OS: manual install or homebrew. Installing with homebrew: Type the following command into the terminal: $ brew install mongodb Installing manually: Download the latest release here. Ma...

A key-value engine created to integrate with Facebook's RocksDB.

A storage engine created by SanDisk that makes it possible to bypass the OS file system layer and write directly to the storage device.

jQuery.ajax({ url: 'https://api.dropboxapi.com/2/users/get_current_account', type: 'POST', headers: { "Authorization": "Bearer <ACCESS_TOKEN>" }, success: function (data) { console.log(data); }, error: function (error) { ...

We use Notification.requestPermission to ask the user if he/she wants to receive notifications from our website. Notification.requestPermission(function() { if (Notification.permission === 'granted') { // user approved. // use of new Notification(...) syntax will now be succe...

After the user has approved a request for permission to send notifications, we can send a simple notification that says Hello to the user: new Notification('Hello', { body: 'Hello, world!', icon: 'url to an .ico image' }); This will send a notification like this: Hello Hello, world!

5 Using property descriptors we can make a property read only, and any attempt to change it's value will fail silently, the value will not be changed and no error will be thrown. The writable property in a property descriptor indicates whether that property can be changed or not. var a = { }; ...

5 We can avoid a property from showing up in for (... in ...) loops The enumerable property of the property descriptor tells whether that property will be enumerated while looping through the object's properties. var obj = { }; Object.defineProperty(obj, "foo", { value: 'show', enu...