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When do I use fabs and when is it sufficient to use std::abs?
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Beware of Android NDK g++, it also cedes to c abs() function instead of std::abs(). In Visual Studio c++ compiler however abs always points to std::abs() though.
– southerton
Nov 5 '15 at 11:06
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Is there a Java equivalent to C#'s 'yield' keyword?
... is more portable (for example, I don't think Aviad's library will work on Android).
Interface
Aviad's library has a cleaner interface - here's an example:
Iterable<Integer> it = new Yielder<Integer>() {
@Override protected void yieldNextCore() {
for (int i = 0; i < 10;...
How do I send a cross-domain POST request via JavaScript?
.... In my experience they do not allow cross domain POST at all. I've tested android, iPad, iPhone
There is a pretty big bug in FF < 3.6 where if the server returns a non 400 response code AND there is a response body (validation errors for example), FF 3.6 wont get the response body. This is a hug...
TCP: can two different sockets share a port?
...:Port without jumping through hoops, but *Nix systems (including Linux and Android) do not.
– Remy Lebeau
Apr 27 '14 at 16:46
7
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Why should we include ttf, eot, woff, svg,… in a font-face
...e.
If you don't want to support IE 8 and lower, and iOS 4 and lower, and android 4.3 or earlier, then you can just use WOFF (and WOFF2, a more highly compressed WOFF, for the newest browsers that support it.)
@font-face {
font-family: 'MyWebFont';
src: url('myfont.woff2') format('woff2'),
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When to use dynamic vs. static libraries
...if you are deciding how to compile you mobile applications for example (in Android you have a choice of static vs dynamic, in iOS you do not - it is always static).
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When to use a key/value store such as Redis instead/along side of a SQL database?
...er to mysql.
I can publish all those gps data and other clients(javascript/android) can subscribe in a real time using message queue based on redis
I can trigger real time alerts
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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...于我的 WebCam 项目，可以通过 MQTT 拍摄和发送 JPEG 图像。Android Camera API 将 JPEG 数据作为字节数组提供。PublishByteArray、SubscribeByteArray 和 PublishedByteArrayReceived 块可用于处理字节数组。
PublishByteArray
此块对应于 PublishEx 方法。这里...
How do you get the footer to stay at the bottom of a Web page?
...t of the header and footer must be known
2) Old versions of IE (IE8-) and Android (4.4-) don't support viewport units. (caniuse)
3) Once upon a time webkit had a problem with viewport units within a calc rule. This has indeed been fixed (see here) so there's no problem there. However if you're loo...
How are ssl certificates verified?
...aid, here is a REALLY IMPORTANT part to remember: your device/OS (Windows, Android, etc.) pretty much keeps a list of all major/trusted CA's and their PUBLIC KEYS (if you're thinking that these public keys are used to decrypt the signatures inside the certificates, YOU ARE CORRECT!).
Ok, if you read...