subfuzion

Reference: RFC 2616 - HTTP Status Code Definitions

• HTTP/1.1 Status Code Definitions
• Additional HTTP Status Codes

General

• 400 BAD REQUEST: The request was invalid or cannot be otherwise served. An accompanying error message will explain further. For security reasons, requests without authentication are considered invalid and will yield this response.
• 401 UNAUTHORIZED: The authentication credentials are missing, or if supplied are not valid or not sufficient to access the resource.
• 403 FORBIDDEN: The request has been refused. See the accompanying message for the specific reason (most likely for exceeding rate limit).
• 404 NOT FOUND: The URI requested is invalid or the resource requested does not exists.
• 406 NOT ACCEPTABLE: The request specified an invalid format.

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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Raynos

Programming with delayed computation

A delayed computation is a function that will do some computation when called. Because of the delayed nature the computation may be asynchronous so the function takes a callback.

Note: the term "delayed computation" is just a temporary name so we can talk about this idea, I do not recommend using this name as it's a) confusing and b) this concept is hard to name.