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App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
...= new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 MIT同步更新的中文本土化 积木式在线App开发平台！ ...
可重入函数、不可重入函数及线程安全 - C/C++ - 清泛网 - 专注C/C++及内核技术
...保存和恢复进程的上下文，然而恢复的上下文仅限于返回地址，cpu寄存器等之类的少量上下文，而函数内部使用的诸如全局或静态变量，buffer等并不在保护之列，所以如果这些值在函数被中断期间发生了改变，那么当函数回到断...
千亿时代 网游走到十字路口 - 资讯 - 清泛网 - 专注C/C++及内核技术
...、同质化”的问题仍然大量存在，固然一些企业开始围绕IP做文章，研发精品重度游戏，但仍然不免在营销、付费等层面存在“捞一把快钱”的想法。“毕竟基于数亿手机游戏用户和强势发行渠道，赚钱的诱惑太大也太容易。况...
Find the host name and port using PSQL commands
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This doesn't work if you have multiple servers in the same cluster, unfortunately...
– Vitor Baptista
Mar 1 '13 at 22:57
3
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PHP mail function doesn't complete sending of e-mail
...applied to any PHP mailing system.
There are a variety of reasons your script appears to not be sending emails. It's difficult to diagnose these things unless there is an obvious syntax error. Without one you need to run through the checklist below to find any potential pitfalls you may be encounte...
How to set proxy for wget?
...omthing like this at command line can work:
export http_proxy=http://your_ip_proxy:port/
export https_proxy=$http_proxy
export ftp_proxy=$http_proxy
export dns_proxy=$http_proxy
export rsync_proxy=$http_proxy
export no_proxy="localhost,127.0.0.1,localaddress,.localdomain.com"
...
How to check with javascript if connection is local host?
I want to have a check in my javascript if the page loading up is on my local machine.
12 Answers
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VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术
...eginPaint函数的第二个参数就是一个绘图信息结构的缓冲区地址，windows会在这里返回绘图信息结构，结构中包含了无效区域的位置和大小，绘图信息结构的定义如下：
typedef struct tagPAINTSTRUCT { // ps
HDC hdc;...
Difference between session affinity and sticky session?
...ou have to support cookie-less browsers
Partition based on the requester's IP address.
Bad if it isn't static or if many come in through the same proxy.
If you authenticate users, partition based on user name (it has to be an HTTP supported authentication mode to do this).
Don't require state.
Let c...
BIO与NIO、AIO的区别(这个容易理解) - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...异步IO时，Java将IO读写委托给OS处理，需要将数据缓冲区地址和大小传给OS(银行卡和密码)，OS需要支持异步IO操作API）；
阻塞 ： ATM排队取款，你只能等待（使用阻塞IO时，Java调用会一直阻塞到读写完成才返回）；
非阻塞 ： 柜...