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1. Engineering is done with numbers. Analysis without numbers is only an opinion. 2. To design a spacecraft right takes an infinite amount of effort. This is why it's a good idea to design them to operate when some things are wrong. 3. Design is an iterative process. The necessary number of iterations is one ... Read more
Observable can provide a stream of data, also can filter the results and you can unsubscribe. It is not possible to do with Promises. Observable can return a value synchronously or asynchronously. Promise is always asynchronous Difference between Promises vs Observables
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Focus on users and not on search engines. If site will be usable for users than the site will be higher on results. Bounce rate - is the percentage of visitors to a particular website who navigate away from the site after viewing only one page. Search engines (like Google or Yahoo) rely on bounce ... Read more
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