I don't know much Ruby outside of a few toy examples I wrote a long time ago. For most languages, there would be parentheses around objects you pass to functions, like `.filter({|x| x.odd? })`. This lends some consistency and makes it easy (for me at least) to understand that an anonymous function is passed to `filter`. Just separating it using spaces feels like Bash, something I find difficult to write anything slightly complicated in.
replyLua, Haskell, ML, plenty of other languages where one-argument functions don't need parentheses. I think it makes a lot of code more readable.
replyAll not-exactly-popular languages.
replydeleted
replyMaybe relative to juggernauts like C or Java. But Lua is pretty widely used.
replyKotlin too
reply> Ruby has the best syntax with regards to blocks/lambdas/closures.
replyA bit of Smalltalk shining through Ruby.