Posts (page 229)
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4 min readTo create a user in PostgreSQL, you can use the command-line interface utility called "psql". Here is the syntax to create a user: CREATE USER username WITH PASSWORD 'password'; Replace "username" with the desired name for the user and "password" with the desired password. This command will create a new user with the specified username and password.To grant specific privileges to the user, you can use the "GRANT" command.
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4 min readTo split a string by "\n" (newline character) in Haskell, you can use the lines function. The lines function takes a string and returns a list of strings broken at newline characters. Here is an example: import Data.List.Split main :: IO () main = do let str = "Hello\nworld\nHow are you?" let splitStrings = lines str print splitStrings Output: ["Hello","world","How are you?"] In this example, the string "Hello\nworld\nHow are you.
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6 min readWhen it comes to hosting a CodeIgniter application, there are several options available depending on your specific needs and preferences. Here are a few popular choices:Shared Hosting: Shared hosting is an affordable option where your application is hosted on a server shared with other websites. While it may be cost-effective, it may lack in terms of performance and resources. Virtual Private Server (VPS): A VPS provides you with more control and resources compared to shared hosting.
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9 min readRunning Discourse on Liquid Web is a relatively simple process that can be done by following a step-by-step tutorial. Discourse is an open-source platform designed for creating online communities and discussion boards.To begin, you will need to have a Liquid Web account and a server set up. The tutorial will guide you through the process of setting up a server with Liquid Web's Managed WordPress offering and installing Discourse on that server.
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6 min readTo grant and revoke privileges in PostgreSQL, you can use the keywords "GRANT" and "REVOKE" along with the appropriate privileges and roles.The GRANT command is used to give specific privileges to users or roles. The basic syntax of the GRANT command is: GRANT privilege_name ON object_name TO {user_name | group_name | role_name}Here, "privilege_name" refers to the specific privilege that you want to grant, such as SELECT, INSERT, UPDATE, DELETE, etc.
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6 min readTo retrieve data from an HTTPS response using Haskell, you can make use of libraries like http-conduit and tls. Here's a simplified explanation of the steps involved:First, make sure you have the necessary dependencies installed. You can include them in your project's cabal or stack file. Import the required modules in your Haskell file: import Network.HTTP.Conduit (parseRequest, newManager, tlsManagerSettings, httpLbs, responseBody) import qualified Data.ByteString.Lazy.
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7 min readTo restore a PostgreSQL database from a backup, you need to follow these steps:Ensure that the PostgreSQL server is running.Locate the backup file that you want to restore. It can be a custom backup created using the pg_dump command or a PostgreSQL binary backup file created using pg_basebackup.Open the command prompt or terminal window.Use the pg_restore command to restore the backup.
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7 min readTo create a type instance of a class in Haskell, you need to follow these steps:Define a new data type using the data keyword. This will be the type for which you want to create an instance of a class. You can specify any number of fields and their respective types within the data type definition. Declare the type instance by using the instance keyword followed by the class name and the type you want to create an instance for.
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3 min readTo deploy Node.js on Bluehost, follow these steps:Log in to your Bluehost account.In the cPanel, navigate to the "Advanced" section and click on "Node.js Manager."Click on "Create Application" to set up a new Node.js application.Enter a name for your application.Choose the desired version of Node.js from the dropdown menu.Select the domain or subdomain where you want to deploy your Node.js application.
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10 min readTo quickly deploy Vue.js on DigitalOcean, you can follow these steps:Sign up for a DigitalOcean account and create a new droplet.Choose a droplet with the desired specifications and the operating system of your choice (e.g., Ubuntu).Once the droplet is created, log in to your droplet using SSH.Update the system by running the command sudo apt update.Install Node.js by running curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash - followed by sudo apt-get install nodejs.Verify that Node.
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6 min readPerforming a backup in PostgreSQL using pg_dump is a common method to create a logical backup of your database. Here are the steps involved:Install PostgreSQL: You need to have PostgreSQL installed on your system before performing the backup. Access the Command Line: Open a terminal or command prompt to access the command line interface. Navigate to PostgreSQL Bin Directory: Use the 'cd' command to navigate to the PostgreSQL bin directory.
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4 min readThe => sign in Haskell is used to declare type constraints. It is typically seen in type signatures, which are used to specify the types of a function's inputs and outputs. The => sign separates the type constraints from the actual type.For example, suppose you have a function that takes two arguments of some type a and returns a value of type b. You can use the => sign to specify constraints on the type a.