4 ms·

I write Lisp but I have no idea what /x means in the example above for instance.

• dzsekijo 7y ago
  The "\" (which is "\" rather than "/", as already pointed out) is just an ascii approximation of λ (just like "u" is used to approximate μ).
• kian 7y ago
  It means a 1-argument lambda, where that one argument is named x
• Jare 7y ago
  That's a syntax knowledge problem, not a readability problem. \x -> introduces a lambda function with a parameter x, like (x) => in javascript etc.