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What's the difference between a continuation and a callback?
...on called call-with-current-continuation which is often abbreviated as callcc. Unfortunately callcc can't be fully implemented in JavaScript, but we could write a replacement function for most of its use cases:
pythagoras(3, 4, console.log);
function pythagoras(x, y, cont) {
var x_squar...
How to select a node using XPath if sibling node has a specific value?
...matching the predicate from <a/>'s predicate:
//a[bb/text() = "zz"]/cc/text()
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How to parse JSON in Scala using standard Scala classes?
...his is a solution based on extractors which will do the class cast:
class CC[T] { def unapply(a:Any):Option[T] = Some(a.asInstanceOf[T]) }
object M extends CC[Map[String, Any]]
object L extends CC[List[Any]]
object S extends CC[String]
object D extends CC[Double]
object B extends CC[Boolean]
val ...
How to get the number of characters in a std::string?
...r string types in non-standard C++ libraries, such as MFC's CString, ATL's CComBSTR, ACE's ACE_CString, and so on, with methods such as .GetLength(), and so on. I can't remember the specifics of them all right off the top of my head.
The STLSoft libraries have abstracted this all out with what they...
一个自媒体的运营手记：我做公众号已经两年多了 - 资讯 - 清泛网 - 专注C/C...
...在做图片的时候，在图片上写明了操作步骤，点击放大，长按识别，然后选择“识别图中的二维码”关注，这个方法，一方面可以减少我的工作量，一方面也方面用户，经过试验之后，发了5000个好友，80%用户都关注了，这个就...
Alarm 闹钟扩展 · App Inventor 2 中文网
...新小米手机上启用”显示弹出窗口”。另一种访问方式：长按应用程序图标，然后选择”应用信息”。
参考
属性 Properties
可绘制覆盖层 CanDrawOverlays
返回是否已授予 SYSTEM_ALERT_WINDOW 权限...
How to mark a build unstable in Jenkins when running shell scripts
... with groovy post-build plugin
if(manager.logContains("Could not login to FTP server")) {
manager.addWarningBadge("FTP Login Failure")
manager.createSummary("warning.gif").appendText("<h1>Failed to login to remote FTP Server!</h1>", false, false, false, "red")
manager.buildU...
Scala: Abstract types vs generics
...o by hand. Besides the loss in conciseness, there is also the problem of accidental name
conflicts between abstract type names that emulate type parameters.
Second, generics and abstract types usually serve distinct roles in Scala programs.
Generics are typically used when one needs just type ...
Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
...cost, but I'm looking for the answer to what do I need to do if I want to accept credit card payments?
9 Answers
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Best way to check if a URL is valid
...at FILTER_VALIDATE_URL will not validate the protocol of a url. So ssh://, ftp:// etc will pass.
– Seph
May 10 '14 at 14:03
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