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

To find the index of a list element in Python, use the built-in index() method. For example, let’s find the first string that equals “Bob” in a list of strings: To find the index of a character in a string, use the index() method on the string. For example, let’s find the first occurrence of

In Python, an else if block is called elif. For instance: Let’s take a deeper look at if…elif…else statements in Python. Python If-Elif-Else Statements In Python, if statements are used to check conditions. You can take specific actions based on the outcome. In Python, use the if…elif…else structure to check if conditions hold. Let’s start

Python string comparison is possible using the comparison operators: ==, !=, <, >, <=, >=. For example: String Comparison in Python Python comes with a list of built-in comparison methods: ==, !=, <, >, <=, >=. You commonly see comparisons made between numeric types in Python. But you can compare strings just as well. As

Counting in Python happens commonly via the count() method. For example, let’s count how many times the word “test” appears in a list: Output: To check how many times a letter occurs in a string, use the count() method of a string. For example: Output: These are two common examples. In this guide, we are

To create a list of strings in Python, add comma-separated strings in between square brackets. For example, here is a list of strings that represent names: Now that you have a list of strings, there are lots of things you might want to do with it. In the following, you are going to learn 10+