Learn about arrays vs. objects to store the data, mapping an array into an object, and using a constant time lookup on contest click.
- [Instructor] Let's now look up…the contest when we click on it.…Right now, the route changes, but the content doesn't.…So we're going to start changing the content here.…In particular, when I click on a contest,…after I change the route, I want to look up the contest.…I want to be able to put things on the state…that are related to that contest that I just clicked.…However, the contest structure is an array.…So right now, api/contest is giving me an array.…And if I want to look up an item using the ID of that item,…I have to scan the array; that's not very efficient.…
What we can do before doing anything related…to contest lookup, is to change the structure…from an array into an object.…Once I have it as an object, my lookup…will be a constant time operation.…So this is what I'm going to do first.…I'm going to go to the api module…and in here, when I return the data as an array,…let's convert it into an object.…There are many ways to do so, the easiest way…is just to reduce array into an object.…Reduce give me a function in the first argument,…
- Configuring webpack and Babel
- Working with native Node modules
- Creating an Express server
- Working with React components and JSX
- Loading and working with test mock data
- Fetching data from a remote API
- Working with data in MongoDB
- Isomorphic rendering on the server
- Front-end routing and back-end routing
Skill Level Advanced
Building a Website with Node.js and Express.jswith Ray Villalobos3h 16m Intermediate
MEAN Stack and MongoDB: Development Techniqueswith Alexander Zanfir1h 48m Intermediate
1. Getting Started
2. Node as a Web Server
3. React Basics
4. Working with Data
5. Rendering on the Server
Fix the checksum problem6m 11s
6. Routing on Client and Server
7. Working with MongoDB
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