Write lambdas without naming the parameters. Example: The unicode character ı(U+0131, not the number 1!) representing a 'slot' can be input in vim with the digraph 'i.' . _ı stands for the same argument as the immediate left ı does. Any suggestions of another unicode character in the 'Letter, Lowercase' category that 1)no one would use as a variable name, and 2)can be easily input in vim are welcome. You can also use _0,_1,_2,... to refer to the 1st, 2nd, 3rd, ... arguments. Just import Syntax.Slot and use either [s| ... |] or [slot| ... |], which are the same thing given two names for convenience.