Python

Python is a popular and beautiful programming language used in data science, web development, maths, and so on. In addition to learning the basics, there are lots of easy-to-understand advanced Python features you need to know. By advanced, I don’t mean hard. These topics are really important but not crucial when learning the basics of […]

To sort a Python list, use the built-in sort() method. For example: Output: Or to reverse sort a list of numbers, you can do: These two are some basic usage of the sort() method in Python. But you can do a lot more with it too, such as: To learn how these and much more,

Python string is a commonly used type. There are many things you want to do with the strings in your Python projects. This is why Python comes in with useful built-in string methods. To be more specific, there are 47 of them. These Python string methods can save the day when working with strings. In

Dealing with strings in Python is common. One popular operation you may want to perform on a string is to change the case to upper or lower case. To convert a Python string to lowercase, use the built-in lower() method of a string. To convert a Python string to uppercase, use the built-in upper() method.

1. Alias With the command line, you can create an alias for a command. As an example, let’s create an alias surf that opens up medium.com. To open up medium.com via the command line you need to use open [URL] syntax: To create an alias surf for this command: 2. Create a new alias surf by adding the following into the .bash_profile: 3. Save the file and restart the

Lambdas in Python are anonymous functions that take any number of arguments but only contain a single expression. As an example, here is a lambda that multiplies a number by three: This lambda isn’t particularly useful as-is because there’s no way to call it. However, you could assign it to a variable and then call

In Swift, properties are either stored properties or computed properties. Getters and setters in Swift are the methods a computed property uses to either set or get a value on-demand. Syntactically, accessing a computed property looks the same as accessing a stored property. For instance, let’s access the computed property kilos of a weight instance: The point is that it runs a piece

Enums in Swift tie related values together in a type-safe way. For example, instead of calling a direction “Up” or “Down” in your program, you should create an enum that couples these options together: Then you can call Direction.Up or Direction.Down. A Common Use Case for Enums in Swift Say you have an app that needs to control the direction of the game character

The Epoch time or the Unix time in computer science is the number of seconds since January 1, 1970. This point in time is the same regardless of where you are on the globe. What Is Epoch Time in Computer Science To track the time, the computer needs to know from where to start. The

To filter a list in Python, use the built-in filter() function. For example, let’s filter a list of ages such that only the ages of 18+ are left: Output: Today you are going to learn three ways to filter a list in Python. We start from a basic for loop approach. Then we use a