finance 41

   JavaScript is a  strange language . Once in a while, you have to deal with a callback that’s in another callback that’s in yet another callback. People affectionately call this pattern the  callback hell . It kinda looks like this: firstFunction(args, function() { secondFunction(args, function() { thirdFunction(args, function() { // And so on… }); }); }); This is JavaScript for you. It’s mind-boggling to see nested callbacks, but I don’t think it’s a “hell”. The “hell” can be manageable if you know what to do with it. On callbacks I assume you know what callbacks are if you’re reading this article. If you don’t, please read   this article  for an introduction to callbacks before continuing. There, we talk about what callbacks are and why you use them in JavaScript. Solutions to callback hell There are four solutions to callback hell: Write comments Split functions into smaller functions Using Promises Using Async/await Before we dive in...

  Sometimes   I wonder if I know much of anything at all. Just a few weeks ago I was talking to a friend who mentioned off-hand, “you would never run an application directly against Node in production”. I nodded vigorously to signal that I also would never ever run against Node in production because…hahaha….everyone knows that. But I didn’t know that! Should I have known that?!?? AM I STILL ALLOWED TO PROGRAM? If I was to draw a Venn Diagram of what I know vs what I feel like everyone else knows, it would look like this… By the way, that tiny dot gets smaller the older I get. There is a better diagram created by Alicia Liu that kind of changed my life. She says that it’s more like this… I love this diagram so much because I want it to be true. I don’t want to spend the rest of my life as a tiny, shrinking blue dot of insignificance. SO DRAMATIC. Blame Pandora. I don’t control what gets played next while I’m writing this article and Dashboard Confessional is a helluva drug. Wel...

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