同步作业

Question

我有两个功能;

  foo ( A, B, C ) 

  bar ( D, E, F ) 

我想要;

 | --------- |
foo         foo 
started    finished

             | -------  |
            bar        bar 
          started    finished

                        | ------ |
                        ^^^^^^^^^^
                         concatenate two list namely C and F 

如何同步这两个功能才能按顺序工作？

你能给出一个示例吗？

Answer 1

foo(A,B,C), bar(D,E,F), append(C,F,Result).