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Does a valid XML file require an XML declaration?
... of the XML 1.0 Recommendation, where it says it "should" be used -- which means it is recommended, but not mandatory. In XML 1.1, however, the declaration is mandatory. See section 2.8 of the XML 1.1 Recommendation, where it says "MUST" be used. It even goes on to state that if the declaration is a...
What makes Scala's operator overloading “good”, but C++'s “bad”?
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C++ inherits true blue operators from C. By that I mean that the "+" in 6 + 4 is very special. You can't, for instance, get a pointer to that + function.
Scala on the other hand doesn't have operators in that way. It just has great flexibility in defining method names plus...
AngularJS : Differences among = & @ in directive scope? [duplicate]
...pe.foo.
{ target : '@' }
This will set scope.target to "foo" because @ means "take it literally." Changes to scope.target won't propagate outside of your directive.
{ bar : '@target' }
This will set scope.bar to "foo" because @ takes it's value from the target attribute. Changes to scope.bar...
Literal suffix for byte in .NET?
...ny way to declare a byte variable in a short way like floats or doubles? I mean like 5f and 5d . Sure I could write byte x = 5 , but that's a bit inconsequential if you use var for local variables.
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“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
...ease output_buffering in your php.ini?
What does "zend_mm_heap corrupted" mean?
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Scala: What is a TypeTag and how do I use it?
...s (like in the example).
A TypeTag is completely compiler-generated, that means that the compiler creates and fills in a TypeTag when one calls a method expecting such a TypeTag. There exist three different forms of tags:
scala.reflect.ClassTag
scala.reflect.api.TypeTags#TypeTag
scala.reflect.api...
Type of conditional expression cannot be determined because there is no implicit conversion between
...s are met, or a compile-time error occurs. Here, "certain good conditions" means certain conversions are possible, which we will get into the details of below.
Now, let's turn to the germane part of the spec:
If only one of x and y has a type, and both x and y are implicitly convertible to that typ...
Android image caching
... @TheRealChx101 could you please help to understand what you mean next time you request for the file from the server through If-None-Match and ETag headers, I'm basically looking for solution approach where image should remain to use form local cache for defined period OR if this can ...
What's the difference between interface and @interface in java?
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The @ symbol denotes an annotation type definition.
That means it is not really an interface, but rather a new annotation type -- to be used as a function modifier, such as @override.
See this javadocs entry on the subject.
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How To Check If A Key in **kwargs Exists?
...args is just another dict. Your first example, if kwargs['errormessage'], means "get the value associated with the key "errormessage" in kwargs, and then check its bool value". So if there's no such key, you'll get a KeyError.
Your second example, if errormessage in kwargs:, means "if kwargs cont...