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Writing unit tests for legacy code – an open letter to developers I work with
This is an email I sent today to developers who work with me, it is exactly as I wrote it except for project and developer names which I’ve redacted. Dear Developers, S asked me a difficult question today, and I think the answer (which took me a few minutes to arrive at) is worth sharing with all developers, mainly because many of you will surely face the exact same problem especially in [maintenance and enhancement] projects. By now I think it is crystal clear that one of our non-ne...
Unit testing,Open letter 2012-02-09 05:39:56
Building the new AJAX mail UI part 2: Better than templates, building highly dynamic web pages
This is part 2 of a series of technical posts documenting some of the interesting work and technologies we’ve used to power the new interface (see also part 1, Instant notifications of new emails via eventsource/server-sent events). Regular users can skip these posts, but we hope technical users find them interesting. As dynamic websites constructed entirely on the client side become de rigueur, there are a number of templating languages battling it out to become the One True Wayâ„...
Web design,Dynamic,Ajax,UI 2012-02-21 05:32:29
Resolve git issue git@github.com: Permission denied (publickey)
Sometimes when clone a remote repository from github.com, you may see below error. D:\Project\Playground\GitBisect>git clone git@github.com:bradleyboy/bisectercise.git Cloning into 'bisectercise'... git@github.com: Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. The issue occurs when there is no key on your machine which is associated with your github account. To fix the issue, please ...
GIT,GITHUB,PERMISSION DENIED,PUBLIC KEY 2019-07-12 10:10:49
HeartBleed: Should C be blamed for the HeartBleed bug?
There is a discussion about the security of applications written in C on Hacker News recently after the report of HeartBleed bug in OpenSSL. In this discussion, some people are saying that the applications written in C are unsafe. It seems all or most of the faults should be laid on C. I think this is biased. The language itself should not be blamed.Safety is a relative term for programming languages. No language is absolutely safe. We claim some languages like Java and C# are safer than C/C++ b...
C,HeartBleed,Analysis,Code review 2014-04-14 03:52:55
6 Most Effective Methods to Code HTML and CSS
IntroductionJust few weeks ago, I have resigned as a "full on" web developer (frontend, backend, server admin and misc) and moved on to become a pure frontend developer (yay)! It is a really exciting change, as you might know frontend developer role didn't exist few years ago. Thanks to the introduction of HTML5, CSS3 and Javascript framework, frontend development has to be separated from backend due to its complexity, and I think I'm trained to fit in that gap nicely.For many years, I've equipp...
Output a file with HTTP range header in PHP
When downloading a large file, we may encounter some network issues which causes download termination and only part of the file is downloaded. When the network connection resumes next time, we may need to redownload the file again from the beginning. In order to save bandwidth, http provides a Range parameter in its header which can control the file transfer flow. With the range parameter in the header, we can resume the download from where we stop. Here is a piece of PHP code snippet which uses...
PHP, range,http, file transfer 2013-01-09 05:55:05
5 reasons on why local businesses need a website
Having a website for a local business is not a matter of doubt – this is what the market demands. Customers turn to the web practically all the time, so you can be sure that when they need a specific product or service, the internet will serve as their first choice. Moreover, having a website will allow every business to expand their operation and deliver their product to a wider market, effectively competing against other providers. Here are 5 key reasons on why any business should be set...
small business, company website 2015-03-30 06:35:54
IDC lists top 6 myths, realities about open source
Summary: What are the top 6 myths? That open source software will enter every market, is inherently innovative, it improves faster than commercial software, that it has less lock-in, that it’s free and that it has little benefit if one is not involved in the community. IDC calls these ideas “myths†but acknowledges there’s more than a grain of truth to all of them At its Directions 2012 conference in Boston today, IDC rev...
IDC,Open source,Reality,Free,Contribution 2012-03-16 08:47:53
JavaScript efficiency catch up
JavaScript is a very flexible language, we can write JavaScript code freely with various styles, different kinds of codes will have different execution efficiency. Here we summarize some tips we get from our development. Efficiency of JavaScript itself JavaScript has execution context chain, closures, prototype inheritance, eval etc. It brings us some magic features, but it also introduces the performance issue, if we don't use them properly, it will affect the codes execution efficiency. 1. Glo...
JavaScript,efficiency,event delegation,eval 2013-04-02 04:08:46
Why Building a Mobile App is Hard
Kent Nguyen has a great article about how building iOS apps takes a lot of work. And, here at Parse, we agree. Making a well-designed app is not a trivial task. Many non-developers hugely underestimate the amount of sweat and tears that goes into a single app. The big component that is overlooked and that Kent stresses is the server component. An app is not an island. Users expect their apps to richly interact with the internet. This means you need to worry about developing code on servers, com...
Mobile app,Hard,Chanllenges,Platform 2012-02-01 04:45:45
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