Learning Advanced JavaScript | Hacker News Reader

Learning Advanced JavaScript

ejohn.org

169 pointsjonmc1219 comments

This is really informative. Being able to edit the examples like that reminds me of the W3c site on crack :). It's silly but I think the colors and fonts have something to do with it.

One thing though, on Chrome (Mac 5.0.342.9 Beta), intermittently I can't click next to get to the next slide, I get the following error: /apps/learn/jquery.chili.js:241 Uncaught ReferenceError: $el is not defined. This does not happen every time.

i ran into some points where i would get stuck on a slide, but refreshing fixed the issue.

I went through the entire thing before and learned alot. I highly recommend it.

Feels very similar to The Little/Seasoned Schemer, I'm sure with a bit more prose this could be the new equivalent. The hard part is coming up with an alternative to all the elephants.

Yeah, I thought about the same book as well :-) I love this kind of tutorials

I must be missing something here: all I see are the slide titles, the code area, and the results underneath. I see no explanatory text anywhere, though the HTML source for each slide is full of it. :-(

Running Firefox 3.6 on Windows XP if that makes any difference.

There is NO explanatory text anywhere.. which HTML source have you seen? The tutorial is really just title, code area and results :-) This is a "learn by example" tutorial, aimed at who already knows a little javascript.

I just did a view source on one of the pages to see if I was missing something, and it was full of what looked like explanations: loads of text in HTML definition lists, which seemed a bit unusual, but I figured that was something to do with how the material was meant to be structured.

I started this tutorial with zero prior knowledge of Javascript, but I have still learned a lot from it. I am now 2/3 of the way through. The challenge of guessing what will work helps to keep me engaged. The extra time that I need to spend on a slide, compared to someone who already knows a little Javascript, is probably paid back in extra retention. I love this tutorial and am excited about adding a little Javascript to my projects.

Never a bad suggestion but it's still a dupe

http://www.google.com/search?q=site:ycombinator.com+http://e...

This is really very nice. Made me learn a lot. It also reminded me of "the little schemer" :-)

Does anybody know of any other such tutorials? Thanks in advance for the help.

I enjoyed Eloquent Javascript. http://eloquentjavascript.net/

http://wtfjs.com/

i hadn't thought about caching results from a function before. that's pretty cool.

It's called memoization

The closure section needs work. My closures never look like that. I have functions that return functions to create my closures, usually via a library via dojo.hitch, $.hitch, or goog.bind.

  window.setTimeout(function(c){return function() {
    c.doSomething();
  }}(this), 1000);

Mine usually look like that. Using any library to do that seems like overkill to me.

Well a hitch or bind function delivers more than just ability to create quick closures. It lets you define the functionality you want in a named function, allowing for code re-use and more readable code. Also I'm obviously not using the library just for bind.

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