I spoke at ClubAjax about optimization of modern web applications. Usually I speak about theoretical matters, but this time I decided to go practical. This is a huge topic and it was blogged/debated/presented to death, including my Improving performance…. Yet I decided to add to it after realizing that many things have changed in last years, including how we build web applications. I concentrated on technical aspects completely bypassing all other areas (e.g., a psychological angle).
. Authors of those "programming pearls" genuinely believed that this code reschedules a function call to the next available time slice after the code that set the timer was executed without introduction of a delay (after all it is 0ms!). In reality a typical delay was 10-20ms. With new generation of browsers it starts with 4ms and jumps to 1000ms for non-current/hidden tabs.
Almost any Java programmer, who starts to study JS groking its OOP facilities and a dynamic nature of JS, thinks that they can be greatly improved and starts its own OOP library/helpers. Majority of them left forgotten when their authors learn more and more details and patterns of JS, yet some grow to fruition and being marketed. This article is dedicated to such people.
The goal of this article is to go over common OOP techniques suitable for JS, their pitfalls, problems, and trade-offs.
Many years ago I decided to replace plain text areas in Django's Admin with rich text editor, so I can edit HTML on my blog using WYSIWYG. Six (yes, 6) years ago I looked around and selected TinyMCE. Over time it turned out that I was forced to upgrade TinyMCE and the link script I had because new browsers continue breaking my rich editor editing. Finally it stopped working again in all modern browsers, and I decided that enough is enough. It is time to replace it. This time I settled on Dojo's Rich Editor hosted on Google CDN — simple, functional, less work to set up.
Today at dojo.connect I did a presentation "RAD CRUD": rapid
development of form-based applications. It continues my other
presentation "CRUD with Dojo", but it is more in depth,
targets Dojo developers, and contains some advanced material.
monthly meeting of ClubAJAX — monthly get-together of
techniques and paradigms: OOP,
My presentation at ClubAJAX got off to a rocky start: I was let in the building 40 minutes after I was supposed to start the presentation. Everybody waited patiently. Thank you guys! As promised I publish slides along with relevant links (I had to skip most of planned demos).
Time to time I sync my blog software to the Django trunk and
introduce small enhancements. Some of them visible to my readers,
some of them are just for me. This time after reading Simon
Willison's post on rev=canonical I decided to add short URLs to my blog as well. This is a convention
to provide custom short URLs managing the mapping on your own web
site. In my opinion the idea is very cool.
Steve Yegge is one of the bloggers I read almost religiously. His posts are full of
insights on the software development topics and in general, and he is
always ready with an amusing anecdote from his rich life. His last post
Have you ever legalized marijuana? didn't disappoint either. The author explains "Shit's Easy Syndrome" (a
difficult topic even for seasoned bloggers) in a gay romp that takes a
reader from a light-hearted review of a book on "bugs in our mental
software" to hapless VPs to many technical difficulties of legalizing a psychoactive drug extracted from the plant Cannabis sativa. But the most entertaining and educating part is the incredible story of the author's life.
As you may know today Google released Friend Connect.
I decided to give it a try. It took about 20 minutes to set up my blog
with 4 gadgets: Members, Sign In, Rate/Review, and Wall/Comments. It
took about 30 minutes to separate the skin from all these widgets, and
set up the Canvas so users can see gadgets in a separate window, if
they want to.