following this meta codegolf stackexchange post, I've stopped using declarations for lambda functions, but one problem this creates is that since you're only inputting the lambda body and not its header, you can't run it in try it online. What would be your suggestions to solve this? can we ignore whatever it says about the bytes on the tio website and just mind whatever the answer says?
edit: I personally use kotlin
In Javascript, you can put f= into the header, the lambda in the body, and then call f in the footer to test:
x=>x+1
In Python, you can put f=\ into the header and then do the same (you need the backslash to escape the newline):
lambda x:x+1
Not all languages allow the sort of formatting that is permitted by Javascript and Python.
For example in Haskell which does not have a way to start a function on a newline without significantly modifying the behavior of the compiler I add an extra assignment to the body f= but remove it from my answer and the byte count.
map(+1)
If you follow the link to the TIO you will see that there are an extra 2 bytes at the beginning. I often also remove the code formatting since it tends not to like anonymous functions.
f= assignment in Haskell if you use the -cpp flag: Try it online!
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-cpp flag does a lot of other stuff too.
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