Which style is more idomatic, or looks/used by vas...

# announcements

[Animesh Sahu]

Which style is more idomatic, or looks/used by vast majority of community?

1. list.map { it.toInt() }
2. list.map(String::toInt)
3. list.map { str: String -> str.toInt() }

[Michael de Kaste]

although a minimal difference, String::toInt is slightly faster iirc.

Another benefit of 2 (and 3) is that the function is typed. And if someone (accidently) changes its type from String to something else, you'll get a compile error, forcing you to take another look at the function to see what would best fit now.

[Animesh Sahu]

@Michael de Kaste they compile to same bytecode, I've checked by decompiling into java.

[Michael de Kaste]

it's all about the metafactory

https://softwareengineering.stackexchange.com/questions/277473/is-there-a-performance-benefit-to-using-the-method-reference-syntax-instead-of-l