St Louis
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10 min readPerforming online schema changes in PostgreSQL is a way to modify the database schema without obstructing concurrent access to the database. This method allows data manipulation and schema changes to occur simultaneously, ensuring minimal downtime for applications.To perform online schema changes in PostgreSQL, you have a few options:Using the pg_repack extension: pg_repack is an extension that allows you to reorganize tables without blocking concurrent operations.
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6 min readPattern matching is a powerful feature in Haskell that allows you to deconstruct data structures and extract values. It is used to define functions that behave differently based on the shape or contents of the input.Here is a general syntax for pattern matching in Haskell: functionName :: DataType -> ReturnType functionName pattern1 = result1 functionName pattern2 = result2 ...
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9 min readPhalcon is a high-performance PHP framework that allows developers to build web applications faster and efficiently. In this tutorial, we will guide you on how to deploy a Phalcon application on GoDaddy, a popular web hosting service.Check Server Requirements: Make sure your GoDaddy hosting plan supports PHP. Ensure that the PHP version meets Phalcon's requirements (e.g., version 7 or above). Set up a GoDaddy Account: Register and purchase a suitable hosting plan on GoDaddy.
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9 min readTo deploy Yii on Vultr, you can follow these steps:Sign up for a Vultr account: Go to the Vultr website (https://www.vultr.com/) and create an account if you don't have one already. Provide the necessary details and complete the registration process. Create a new server: After logging into your Vultr account, click on the "Servers" tab and then click on the blue "+ Deploy New Server" button. Select the desired server location, server type, operating system, and server size.
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7 min readLogical replication in PostgreSQL allows you to replicate selected tables or parts of tables from one PostgreSQL database to another. It provides a flexible and powerful way to create replication setups for various use cases.To implement logical replication in PostgreSQL, you need to follow these steps:Set up the publisher database: The database from which the data will be replicated is called the publisher.
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5 min readTo write a simple "Hello World" program in Haskell, follow these steps:Open a text editor or an Integrated Development Environment (IDE) that supports Haskell programming. Create a new Haskell source file with a .hs extension, such as helloWorld.hs. In the newly created file, start by defining a main function. The main function is the entry point for any Haskell program. Inside the main function, use the putStrLn function to print the string "Hello, World!" to the console.
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7 min readCaligrafy is a powerful text analysis tool that allows you to extract valuable insights from textual data. Installing Caligrafy on Cloudways is a straightforward process that can be completed in a few simple steps.Start by logging in to your Cloudways account. Navigate to the Managed Applications section and click on the "Add Application" button. Choose your preferred application name and select the desired project. Then, select the cloud provider and server size that suits your needs.
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8 min readStreaming replication in PostgreSQL is a method for creating a standby server that continuously keeps itself up to date with the primary server. This setup ensures high availability, fault tolerance, and data synchronization in case of failures.Here's a step-by-step guide on setting up and configuring streaming replication in PostgreSQL:Prepare the Primary Server: Install PostgreSQL on the primary server if it's not already installed. Configure the primary server's postgresql.
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9 min readTo define a function in Haskell, you can use the following syntax: functionName :: Type1 -> Type2 -> ... -> ReturnType functionName parameter1 parameter2 ... = functionBody Here's a breakdown of the syntax:functionName is the name of your function. Choose a descriptive name that reflects the function's purpose.Type1, Type2, etc. specify the types of the parameters the function takes as input. Replace these with the actual types your function requires.
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10 min readTo publish Drupal on A2 hosting, you can follow these steps:Purchase a hosting plan: Visit the A2 hosting website and select a suitable hosting plan that fits your needs. Proceed with the payment to complete the purchase. Set up your domain: If you already have a domain, you can point it to your A2 hosting account by changing the nameservers at your domain registrar. Alternatively, you can purchase a domain directly from A2 hosting.
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8 min readPostgreSQL is an open-source relational database management system that offers different data types to store and manipulate data effectively. Two popular data types in PostgreSQL are hstore and jsonb, both of which allow for flexible storage of semi-structured data.hstore: The hstore data type in PostgreSQL stores key-value pairs where both the keys and values are of type text. It provides a simple way to store and query dynamic attributes without the need for defining a fixed schema.