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javascript check for not null
... }
The Strict Not Version uses the "Strict Equality Comparison Algorithm" http://www.ecma-international.org/ecma-262/5.1/#sec-11.9.6. The !== has faster performance, than the != operator because the Strict Equality Comparison Algorithm doesn't typecast values.
2. Non-strict Not Version
if (val != '...
Why do we use Base64?
...rs "\nFrom " with "\n>From " when it saves the message to a mailbox. Or HTTP headers are newline terminated with no reversible way to escape newlines in the data (line continuation conflates whitespace), so you can't just dump arbitrary ASCII into them either. base64 is better than just 7-bit saf...
Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...，这样能够提升代码的效率。
代码性能优化建议
原文: http://developer.android.com/training/articles/perf-tips.html
原翻译地址：http://hukai.me/android-training-course-in-chinese/performance/performance-tips.html
通常来说，高效的代码需要满足下面两个规...
ReactJS: Modeling Bi-Directional Infinite Scrolling
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have a look at http://adazzle.github.io/react-data-grid/index.html#
This looks like a powerful and performant datagrid with Excel-like features and lazy loading/optimized rendering (for millions of rows) with rich editing features (MIT lice...
Explain the concept of a stack frame in a nutshell
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Why are iframes considered dangerous and a security risk?
...<iframe> or not. The only real protection from this attack is to add HTTP header X-Frame-Options: DENY and hope that the browser knows its job.
In addition, IFRAME element may be a security risk if any page on your site contains an XSS vulnerability which can be exploited. In that case the at...
Shrink a YouTube video to responsive width
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You can watch the youtube iframe example Here @ http://alistapart.com/d/creating-intrinsic-ratios-for-video/example4.html
– Vignesh Chinnaiyan
Jun 4 '16 at 12:00
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Maximum single-sell profit
...by splitting the input in half, solving the problem in each subarray, then combining the two together. Turns out we actually can do this, and can do so efficiently! The intuition is as follows. If we have a single day, the best option is to buy on that day and then sell it back on the same day fo...
Sending and Parsing JSON Objects in Android [closed]
... }
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpC...
Django development IDE [closed]
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I use Vim:
http://github.com/skyl/vim-config-python-ide
[UPDATE]
Sublime Text 2 is pretty awesome. It supports a lot of Vim commands if you want them: Vintage Mode
It has a nice package manager: http://wbond.net/sublime_packages/pack...