What is Hollywood Principle?
Do not call us, we will call you. Framework code runs your hooks instead of your code driving the framework.
the clock calls · your hook runs
Hollywood principle means the framework…
Write it in your own words in the app.
In real work
Hollywood principle: the system calls our app delegate at launch. We do not poll the OS for lifecycle events.
In the illustration
The clock's gears turn and the hour cam trips; the door flips open and the clock's arm pushes your hook out. The hook never moves until it is called.
Rewrite the sync job in your coding agent on the hollywood principle: the scheduler calls our onTick hook instead of our code driving the scheduler loop.
Try it now
The fastest way to learn a word is to use it. Open this line in the agent you already work in and watch what it does. Change the tool to the one you use.
Go further
01Practice
Make it stick
One term a day, a short quiz, and sentence practice that checks your own words.
02Verify
Prove you know it
Pass the quiz and keep it in a Skills Wallet you can share with anyone who needs proof.
03Career
Find the work that uses it
See which roles lean on this vocabulary, and what they pay in year one.
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