Cyrrying in js

1-IDENTITY.js

function identity(args) {
    return args;
  }
  module.exports = identity;

2-BINARY.js

function binary(first, second){
    
    return first + second;
}
module.exports = binary;

3-DELAY_INVOCATION.js

function unary(inputFirst) {
    return function unaryNew(inputSecond) {
        return inputFirst + inputSecond;
    }
}
module.exports = unary;

4-LONG_DELAY_INVOCATION.js

var sum = 0;
function func(argFirst) {
  if (argFirst === undefined) {
    var result = sum;
    sum = null;
    return result;
  } else {
    sum += argFirst;
    return func;
  }
};

module.exports = func;

5-CALL_AND_APPLY.js

var callAndApply = {
    caller: function (object, method, nameArg, ageArg, tShirtSizeArg) {
        //your code
      method.call(object, nameArg, ageArg, tShirtSizeArg)
    },
    applier: function (object, method, argumentsArr) {
        //your code
      method.apply(object, argumentsArr);
    }
  };
  module.exports = callAndApply;

6-CURRY_FUNCTION.js

function abc(fn) {
  var arr = fn.length;

  return function curried(...args) {
    if (args.length < arr) {
      return (...nextArgs) =>
        curried(...args, ...nextArgs);
    }

    return fn(...args)
  };
}

module.exports = abc;