Lambdas in Python

Lambdas in Python

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 …

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getters and setters in swift

Getters and Setters in Swift – Computed Properties

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. A stored property stores a value for later use (for example, a variable that belongs to a class instance). A computed property does not store a value. Instead, it computes …

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Enums in Swift

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 …

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Counting in Python

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 …

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