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How to implement a custom AlertDialog View
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This gives a ClassCastException when the custom layout contains an EditText, because getCurrentFocus() will return the EditText and an EditText can't be cast to a ViewGroup. Using null as the second argument fixes this.
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How to get the name of enumeration value in Swift?
... case .Full:
return "Full"
}
}
}
And then casting the enum as String:
String(UIDevice.currentDevice().batteryState)
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How to define optional methods in Swift protocol?
...xtension to disallow conforming types to customize unless you specifically cast down to its dynamicType to show you want the conformer's custom implementation.
– matthias
Oct 1 '15 at 9:54
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Call to getLayoutInflater() in places not in activity
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@RohanBhatia Davides answer does not require casting which mine does. If the call to getSystemService for some (unlikely) reason does not return an object of type LayoutInflater then my code would cause a runtime exception.
– kaspermoerch
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How to load JAR files dynamically at Runtime?
...ustom loader.
To add jars just call ClassLoader.getSystemClassLoader() and cast it to your class.
Check out this implementation for a carefully crafted classloader. Please note, you can change the add() method to public.
sha...
Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
这篇帖子是关于在MIT App Inventor中遇到错误908（权限接收短信）的讨论。一位用户遇到了这个问题，并询问是否有人知道如何解决。其他用户提供了一些可能的解决方案，包括检查应用程序权限设置、确保手机上的权限设置正确...
Execute a terminal command from a Cocoa app
...should always be an NSString.
So, as long as it's not nil, the result can cast as a Swift String and returned.
If for some reason no NSString at all can be initialized from the file data, the function returns an error message. The function could have been written to return an optional String?, but...
Sending HTTP POST Request In Java
... it to a URLConnection using url.openConnection();. After that, we need to cast it to a HttpURLConnection, so we can access its setRequestMethod() method to set our method. We finally say that we are going to send data over the connection.
URL url = new URL("https://www.example.com/login");
URLConn...
What is the C# equivalent to Java's isInstance()?
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Depends, use is if you don't want to use the result of the cast and use as if you do. You hardly ever want to write:
if(foo is Bar) {
return (Bar)foo;
}
Instead of:
var bar = foo as Bar;
if(bar != null) {
return bar;
}
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Reshaping data.frame from wide to long format
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reshape() takes a while to get used to, just as melt/cast. Here is a solution with reshape, assuming your data frame is called d:
reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
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