You can save one character by doing this: (x=0)=>_=>++x the underscore is another variable but a single variable does not require parenthesis. So instead of t

You can save one character by doing this: (x=0)=>_=>++x the underscore is another variable but a single variable does not require parenthesis. So instead of two chars for the two parens, you use a single char for a single letter variable. JS FTW ;)