github.com/packtpublishing/learning-functional-programming-in-go@v0.0.0-20230130084745-8b849f6d58c4/Chapter09/misc/ex2/lambda.js (about)

     1  var add = function (a) {
     2      return function (b) {
     3          return a + b;
     4      };
     5  };
     6  add2 = add(2);
     7  
     8  add2(1) == 6
     9  
    10  
    11  const add = a => b => a + b;
    12  add2 = add(2);