Angular - Promises and Observables

Promise Promises deal with one asynchronous event at a time. In Angular we can use either Promises or Observables. By default the Angular Http service returns an Observable. To prove this, hover the mouse over the get() method of the Http service in any service.ts file. Notice from the intelligence, that it returns Observable[Response].  To use Promises instead of Observables we will have to...

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IList and IEnumerable

In LINQ to query data from collections, we use IEnumerable and IList for data manipulation.IEnumerable is inherited by IList, hence it has all the features of it and except this, it has its own features. IList has below advantage over IEnumerable. IList IList exists in System.Collections Namespace. IList is used to access an element in a specific position/index in a list. Like IEnumerable,...

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