That's quite an interesting, if frightening, take on it. Assuming a developer knows what `map` does, then I wouldn't have very much confidence in their reading comprehension if they somehow mentally skipped over the main higher order function being called on a three word line of code.
Would anyone expect such a developer to read and parse several more lines of code more reliably, in order to understand the algorithmic complexity? Seems unwarranted to me...
Would anyone expect such a developer to read and parse several more lines of code more reliably, in order to understand the algorithmic complexity? Seems unwarranted to me...