The fast and easy way to use this example is via StackBlitz:
StackBlitz for observable-composing-and-chaining
Alternatively, you can clone the repository locally to run the example:
git clone https://bitbucket.csesoftware.com/scm/cat/403-observable-composing-and-chaining.git
cd 403-observable-composing-and-chaining
npm install
npm start
Then browse to http://localhost:4200.
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