July 2017
Intermediate to advanced
454 pages
10h 1m
English
Content preview from Expert Angular
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What is a Promise?
A Promise is a sincere assurance that an action will be performed. It calls back a function when the server responds with the result. We request an asynchronous service with a callback function to perform some operation and the service calls our callback function with either the result or with the error. You can read more about promises in Chapter 7, Asynchronous Programming Using Observables.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.