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What is a “callable”?
...t's clear what a metaclass is , there is an associated concept that I use all the time without knowing what it really means.
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Easy way to convert Iterable to Collection
...ewHashSet(Iterable), among other similar methods. This will of course copy all the elements in to memory. If that isn't acceptable, I think your code that works with these ought to take Iterable rather than Collection. Guava also happens to provide convenient methods for doing things you can do on a...
How to pass a user defined argument in scrapy spider
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The above code is only partially working for me. For eg. If I define domain using self.domain, I'm still not able to access it outside the __init__ method. Python throws a not defined error. BTW, why have you omitted the super call? PS. I'm working wit...
MySQL select where column is not empty
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answered Dec 8 '09 at 19:32
Stanislav StoyanovStanislav Stoyanov
1,67222 gold badges1616 silver badges2121 bronze badges
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Difference between Role and GrantedAuthority in Spring Security
...thority as being a "permission" or a "right". Those "permissions" are (normally) expressed as strings (with the getAuthority() method). Those strings let you identify the permissions and let your voters decide if they grant access to something.
You can grant different GrantedAuthoritys (permissions...
Java Pass Method as Parameter
...out.println(data.toString());
}
}
public static void callCommand(Command command, Object data)
{
command.execute(data);
}
public static void main(String... args)
{
callCommand(new PrintCommand(), "hello world");
}
}
Edit: as Pete Kirkham ...
Can a class member function template be virtual?
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Templates are all about the compiler generating code at compile-time. Virtual functions are all about the run-time system figuring out which function to call at run-time.
Once the run-time system figured out it would need to call a templ...
Intersection and union of ArrayLists in Java
...mentation without using any third-party library. Main advantage over retainAll, removeAll and addAll is that these methods don't modify the original lists input to the methods.
public class Test {
public static void main(String... args) throws Exception {
List<String> list1 = ne...
Conversion of System.Array to List
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None of these examples actually answer the actual question. But I guess he accepted the answer so he was happy. Still, not one of these actually convert an Array to a List. "Conversion of System.Array to List". Should add that example for completeness ...
Accessing an array out of bounds gives no error, why?
...r make demons come out of your nose. It may format your harddrive or email all your porn to your grandmother.
It may even, if you are really unlucky, appear to work correctly.
The language simply says what should happen if you access the elements within the bounds of an array. It is left undefined...