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[angular] What is the difference between Promises and Observables?
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What is the difference between Promises and Observables?
Promise:
Provide a single future value;
Not lazy;
Not cancellable;
Observable:
Emits multiple values over time;
Lazy;
Cancellable;
Supports map, filter, reduce and similar operators
You can use promises instead of observables when calling HTTP in Angular if you wish.
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