currying in TypeScript! Currying any function.

curry.ts

function isFunction(obj: any): boolean {
  return typeof(obj) == "function";
}

function curry(func: any) {
  if (!isFunction(func)) {
    console.log("Fatal Error. An invalid value was given. It was not a function");
    return;
  }

  const lamdbdaStr = (lamArgs =>
    ((temp) => {
      for (var i = 0; i < lamArgs.length; i++) 
        temp += "(" + lamArgs[i] + ") => ";

      return temp + "func(" + lamArgs.join(", ") + ")";
    })("")
  )(iota(f.length).map(x => "arg" + x));

  return eval(lamdbdaStr);
}

console.log("isFunction(curry(add3))          : " + isFunction(curry(add3)));//true
console.log("isFunction(curry(add3)(1))       : " + isFunction(curry(add3)(1)));//true
console.log("isFunction(curry(add3)(1)(2))    : " + isFunction(curry(add3)(1)(2)));//true
console.log("isFunction(curry(add3)(1)(2)(3)) : " + isFunction(curry(add3)(1)(2)(3)));//false

console.log(curry(add3)(1)(2)(3) == 6);