The word synchronization literally refers to temporal existence—things occurring at the same time. It seems then that the most apt demonstration of synchronicity will be something involving time itself.
When we think about the ways time impacts us, it's generally a matter of scheduling, due dates, and coordination. Going back to our preliminary example from the Preface, if one wishes to plan their grandmother's birthday party, the following types of scheduled tasks can take several forms:
- Things that must be done by a certain time (the actual party)
- Things that cannot be done until another task is completed (putting up decorations before they're purchased)
- Things that can be done in any particular order without impacting the outcome (cleaning the house)
- Things that can be done in any order but may well impact the outcome (buying a cake before finding out what cake your grandmother likes the most)
With these in mind, we'll attempt to handle some rudimentary human scheduling by designing an appointment calendar that can handle any number of people with one hour timeslots between 9 a.m. and 5 p.m.
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