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Capture HTML Canvas as gif/jpg/png/pdf?
...ar canvas = document.getElementById("mycanvas");
var img = canvas.toDataURL("image/png");
with the value in IMG you can write it out as a new Image like so:
document.write('<img src="'+img+'"/>');
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PreparedStatement IN clause alternatives?
...he joined table is to use a LEFT JOIN together with the IS NULL. 'SELECT a.URL, b.URL FROM TABLE_A a LEFT JOIN TABLE_B b ON a_A.URL = b_B.URL WHERE b.URL IS NULL' This will show all the rows in table A that have no match in table B.
– Jens Tandstad
Nov 10 '14 ...
Boost智能指针——shared_ptr - C/C++ - 清泛网 - 专注C/C++及内核技术
...shared_ptrboost::scoped_ptr虽然简单易用，但它不能共享所有权的特性却大大限制了其使用范围，而boost::shared_ptr可以解决这一局限。顾名思义，boos...boost::scoped_ptr虽然简单易用，但它不能共享所有权的特性却大大限制了其使用范围，...
Windows2003 server 域的无缝切换及重新安装 - 操作系统(内核) - 清泛网 - ...
Windows2003 server 域的无缝切换及重新安装故障描述：Windows server 2003主域中毒杀毒后总是提示内存不够，及注册表报错分析域故障和修复注册表这个活基本上不是人干的，另辟蹊径...故障描述： Windows server 2003 主域中毒杀毒后 总是...
App开发如何更快捷？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
App开发如何更快捷？如今，专业的第三方服务为App开发缩短了周期降低了成本，让App开发越来越简单快捷。APICloud 是中国领先的云端一体移动应用云服务提供商，...如今，专业的第三方服务为App开发缩短了周期降低了成本，让App...
程序员之网络安全系列（四）：数据加密之非对称秘钥 - 更多技术 - 清泛网 -...
...看到情书内容？（保密性)
如何保证隔壁老王不修改情书的内容？（完整性)
如何保证隔壁老王不冒充明明？（身份认证)
如何保证明明不能否认情书是自己写的？（来源的不可否认)
程序员之网络安全系列（二）：如何安...
How do you create a REST client for Java? [closed]
...PIs:
private void updateCustomer(Customer customer) {
try {
URL url = new URL("http://www.example.com/customers");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setInstanceFollowRedirects(fa...
Recommended way to embed PDF in HTML?
...<embed src="https://drive.google.com/viewerng/
viewer?embedded=true&url=http://example.com/the.pdf" width="500" height="375">
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Spring Boot not serving static content
...[] staticLocations = RESOURCE_LOCATIONS;
As mentioned before, the request URL will be resolved relative to these locations. Thus src/main/resources/static/index.html will be served when the request URL is /index.html. The class that is responsible for resolving the path, as of Spring 4.1, is org.sp...
MySQL string replace
I have a column containing urls (id, url):
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