Grokking Simplicity

17 Coordinating timelines

In this chapter

• Learn how to create a primitive to coordinate multiple timelines.
• Learn how functional programmers manipulate the two important aspects of time, ordering and repetition.

In the last chapter, we learned to diagnose resource-sharing bugs and created a concurrency primitive to share resources safely. Sometimes, multiple timelines need to work together when there’s no explicit resource they are sharing. In this chapter, we will build a concurrency primitive that will help timelines coordinate and eliminate incorrect possible orderings.

Principles of working with timelines

Here are the principles again as a reminder. In the last two chapters, we worked through principles 1–4, showing how they help ensure ...