Useful tips for everyday
When to use upsert or update in PostgreSQL? The idea is that when you insert a new row into the table, PostgreSQL will update the…
How do you reference in R? citation() To cite R in publications use: R Core Team (2013). R: A language and environment for statistical computing.…
Can I remove www from my website? Most websites on Apache servers are created to use the “www” prefix by default. When removing “www” it’s…
What are the different algorithms to compute the nearest neighbors? The k-nearest neighbors (KNN) algorithm is a simple, supervised machine learning algorithm that can be…
What is linear transformation in matrix? Definition. A plane transformation F is linear if either of the following equivalent conditions holds: F(x,y)=(ax+by,cx+dy) for some real…
What are the disadvantages of 2FA? Cons of two-factor authentication Time-consuming. Time may be an absolute metric, but it’s also relative. Cost. Like time, cost…
Can you change notifications for a single contact? To start, open the Messages app on your Galaxy, then select a chat that you want to…
Where do I find user alerts on my website? On the Site Actions menu , select Site Settings, and then select Modify All Site Settings.…
How do I exclude a site from a Google search? Exclude sites from your search engine: In the Basics tab, click Advanced under Sites to…
What material will repel a magnet? Water, wood, people, plastic, graphite and plaster are all examples of diamagnetic materials. While we usually think of these…