Kotlin Tip #8: Embrace Single Expression Functions — 100 Kotlin Tips in 100 Days
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Tip #7: Make use of Extension Functions
What I like the most about single-expression functions is how they allow developers to define functions in a way that closely mirrors mathematical functions. For example, consider the mathematical function f(x) = x * 2. In Kotlin, this can be directly translated into code:
This simplicity is not just about saving lines of code; it’s about making the code more readable and directly mapping to the mathematical logic it represents, making it easier to transition to a more functional programming approach.
Let’s take a look at another example, a function to calculate the nth Fibonacci number, a problem commonly solved using recursion, a staple in functional programming:
Single-expression functions let you define functions that return the result of a single expression without the need for curly braces, return statements, and, in many cases, explicit return types.
The synergy between mathematical elegance and functional programming in Kotlin does not stop at single-expression functions. It extends to higher-order functions, immutability, and pure functions, all foundational to functional programming. Concepts you can learn in my series of Going Functional with Kotlin.
I hope you have enjoyed the eighth tip of our series! Don’t forget to subscribe and stay tuned for more Kotlin tips!
Stay curious!
Tip #8: Utilize Higher-Order Functions
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