October 2018
Intermediate to advanced
590 pages
15h 5m
English
Content preview from Building Applications with Spring 5 and Vue.js 2
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Hoisting
This is another thing that Java developers usually easily get confused. Hoisting is a metaphor for the way that JavaScript interpreters will lift function declarations and variable declarations to the top of their containing scope. So, In JavaScript, you can see something that is obviously wrong and will definitely break the compilation if you write that in Java, but it is totally valid in JavaScript.
Let’s see an example:
1. travel = 'No plan';2. var travel;3. console.log(travel); // Is the output: undefined? 4.5. function travel() {6. console.log('Traveling');7. }8. travel(); // Is the output: Traveling?
What will the output be when the JavaScript engine executes line 3 and 8? It is not undefined, and not Traveling. Line 3 is ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.