this post was submitted on 05 Sep 2024
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Programming
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Yeah, in Java calling
first()
on a stream is the same as an early return in a for-loop, where for each element all of the previous stream operations are applied first.So the stream operation
is equivalent to doing the following imperatively
Not to mention Kotlin actually supports non-local returns in lambdas under specific circumstances, which allows for even more circumstances to be expressed with functional chaining.
These are not quite equivalent. In terms of short-circuiting yeah they both short-circuit when they get the value. But the latter is returning from the current function and the former is not. If you add a return to that first example then they are equivalent. But then cannot be used in line. Which is a nice advantage to the former - it can be used inline with less faff as you can just assign the return to a value. The latter needs you to declare a variable, assign it and break from the loop in the if.
Personally I quite like how the former requires less modification to work in different contexts and find it nicer to read. Though not all logic is easier to read with a stream, sometimes a good old for loop makes the code more readable. Use which ever helps you best at each point. Never blindly apply some pattern to every situation.
Well yes, I was simplifying because I wanted to address the main (incorrect) criticism by @spartanatreyu@programming.dev. I agree with your comment