Kotlin Tip #12: Learn About Lambda Expressions— 100 Kotlin Tips in 100 Days
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Tip #11: Prefer Data Classes for Classes Meant to Hold Data
Lambda expressions in Kotlin bring a level of expressiveness and conciseness to the language that makes writing anonymous functions simpler and more intuitive.
Lambdas are a short block of code that takes in parameters and returns a value. They are surrounded by curly braces {} which contain the code, parameters are declared inside the braces and the body of the lambda follows a -> symbol. Take a look:
Lambdas can also take arguments and return values:
And you can even make the arguments and return type more explicit:
With lambdas in hand, you can reutilize them in different places of your codebase. A good example is by defining conditions that can then be reused for filtering lists:
Or even build your own higher-order functions to receive lambdas, as explained in tip #9: Utilize Higher-Order Functions:
Lambdas are a fundamental part of Kotlin that enables a more expressive, functional, and readable style of programming. They allow you to reduce boilerplate, emphasizing clarity, and focus on the what rather than the how, leading to cleaner and more maintainable code.
I hope you have enjoyed the ninth tip of our series! Don’t forget to subscribe and stay tuned for more Kotlin tips!
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