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PhantomJS failing to open HTTPS site
I'm using the following code based on loadspeed.js example to open up a https:// site which requires http server authentication as well.
...
C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
...printf的源代码的这里
声明部分：
int pos =0 ,cnt_printed_chars =0 ,i ;
unsigned char *chptr ;
va_list ap ;
%s格式控制部分：
case 's':
chptr =va_arg (ap ,unsigned char *);
i =0 ;
while (chptr [i ])
...
Select N random elements from a List in C#
...
OK a year late but... Doesn't this pan out to @ersin's rather shorter answer, and won't it fail if you get a repeated random number (Where Ersin's will have a bias towards the first item of a repeated pair)
– Andiih
Sep 8...
Remove/hide a preference from the screen
...pp:isPreferenceVisible="false" />
...
The attribute is documented at https://developer.android.com/guide/topics/ui/settings/components-and-attributes
Adding PreferenceFragmentCompat is documented at https://developer.android.com/guide/topics/ui/settings/#inflate_the_hierarchy
Example:
publi...
Calculating frames per second in a game
...
I think it's the simplest and preferred way. You just to keep track of
cn: counter of how many frames you've rendered
time_start: the time since you've started counting
time_now: the current time
Calculating the fps in this case is as simple as evaluating this formula:
FPS = cn / (time_now -...
pdf2htmlEX实现pdf转html - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...nction(){_.schedule_render();});
修改之后的Pdf2htmlEXUtil
package cn.com.oims.util;
import cn.com.oims.config.BaseConfig;
/**@author liuzhengyong
* @version 1.0 时间：2013-12-30 下午2:24:10
* pdf文件转html工具类
*/
public class Pdf2htmlEXUtil {
<span style="white-s...
.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
...in this case", I'll gladly upvote this answer.
– Tom Panning
Nov 18 '13 at 19:30
I'm learning here. If instead I use: ...
Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ript”); ga.type = “text/javascript”; ga.async = true;
ga.src = (“https:” == document.location.protocol ? “https://ssl” : “http://www”) + “.google-analytics.com/ga.js”;
var s = document.getElementsByTagName(“script”)[0]; s.parentNode.insertBefore(ga, s);
})();
</scri...
Difference between abstract class and interface in Python
... a more basic way to explain:
An interface is sort of like an empty muffin pan.
It's a class file with a set of method definitions that have no code.
An abstract class is the same thing, but not all functions need to be empty. Some can have code. It's not strictly empty.
Why differentiate:
There's...
App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
...01-B5A3-F393-E0A9-E50E24DCCA9E。
标准16位UUID技术文档请参考：https://www.bluetooth.com/specifications/assigned-numbers/。
点此自助购买 以上演示的aia源码。
BLE专业文档
更多关于BLE更深入的技术原理介绍，请参考BLE技术揭秘。
最后做个推广...