はてなブックマーク

Update - June 19, 2016: A lot of people have been suggesting the same "solutions" to the problems below, but none of them are practical. I've published a new post with a slightly sarcastic flowchart - please have a look at it before suggesting a solution. Unfortunately, lately I've seen more and more people recommending to use JWT (JSON Web Tokens) for managing user sessions in their web applicati

A topic that frequently confuses users in the #Node.js channel, is the Promise.try method provided by Bluebird. People often struggle to understand what it is, or why they should use it - and this isn't helped by the fact that almost all guides to Promises fail to demonstrate its use. In this brief article, I hope to provide a better explanation of what Promise.try is, and why you should always us

MongoDB is evil. It... ... loses data (sources: 1, 2) ... in fact, for a long time, ignored errors by default and assumed every single write succeeded no matter what (which on 32-bits systems led to losing all data silently after some 3GB, due to MongoDB limitations) ... is slow, even at its advertised usecases, and claims to the contrary are completely lacking evidence (sources: 3, 4) ... forces