Tutorial by Examples: c

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...

Ordinarily, images are pulled automatically from Docker Hub. Docker will attempt to pull any image from Docker Hub that doesn't already exist on the Docker host. For example, using docker run ubuntu when the ubuntu image is not already on the Docker host will cause Docker to initiate a pull of the l...

$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest 693bce725149 6 days ago 967 B postgres 9.5 0f3af79d8673 10 weeks ago 265.7 MB postgres ...

Docker commands which take the name of an image accept four different forms: TypeExampleShort ID693bce725149Namehello-world (defaults to :latest tag)Name+taghello-world:latestDigesthello-world@sha256:e52be8ffeeb1f374f440893189cd32f44cb166650e7ab185fa7735b7dc48d619 Note: You can only refer to an im...

First, make sure that you have configured your package (as said in Setting up a package configuration​). Then, you have to be logged in to npmjs. If you already have a npm user npm login If you don't have a user npm adduser To check that your user is registered in the current client npm co...

Once you've paused execution on a breakpoint, you may want to follow execution line-by-line to observe what happens. Open your browser's Developer Tools and look for the Execution Control icons. (This example uses the icons in Google Chrome, but they'll be similar in other browsers.) Resume: Unpau...

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 ...

A ViewPager allows to show multiple fragments in an activity that can be navigated by either fliping left or right. A ViewPager needs to be feed of either Views or Fragments by using a PagerAdapter. There are however two more specific implementations that you will find most useful in case of using ...

Razor has its own comment syntax which begins with @* and ends with *@. Inline Comment: <h1>Comments can be @*hi!*@ inline</h1> Multi-line Comment: @* Comments can spread over multiple lines *@ HTML Comment You can also use the normal HTML comment syntax starting with &...

While inside a Razor code block, the browser will only recognize HTML code if the code is escaped. Use @: for a Single line: @foreach(int number in Model.Numbers) { @:<h1>Hello, I am a header!</h1> } Use <text> ... </text> for Multi-line: @{ var number = 1; ...

Razor code can be inserted anywhere within HTML code. Razor code blocks are enclosed in @{ ... }. Inline variable and functions start with @. Code inside the Razor brackets follow the normal C# or VB rules. Single line statement: @{ var firstNumber = 1; } Multi-line code block: @{ var sec...

First create an express app: const express = require('express'); const app = express(); Then you can define routes like this: app.get('/someUri', function (req, res, next) {}) That structure works for all HTTP methods, and expects a path as the first argument, and a handler for that path, w...

SQL TermsMongoDB TermsDatabaseDatabaseTableCollectionEntity / RowDocumentColumnKey / FieldTable JoinEmbedded DocumentsPrimary KeyPrimary Key (Default key _id provided by mongodb itself)

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

This uses the Dropbox .NET SDK to download a file from the Dropbox API at the remote path to the local file "Test", while tracking progress: var response = await client.Files.DownloadAsync(path); ulong fileSize = response.Response.Size; const int bufferSize = 1024 * 1024; var buffer ...