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How to trigger event when a variable's value is changed?
...ge of this approach is that you let any other classes that want to inherit from your class to change the behavior if necessary.
If you want to catch an event in a different thread that it's being raised you must be careful not to change the state of objects that are defined in another thread which ...
What's the difference between == and .equals in Scala?
...he AnyRef.equals(Any) method is the one overridden by subclasses. A method from the Java Specification that has come over to Scala too. If used on an unboxed instance, it is boxed to call this (though hidden in Scala; more obvious in Java with int->Integer). The default implementation merely comp...
What's the difference between Invoke() and BeginInvoke()
....BeginInvoke is easier to get right, and will avoid your background thread from having to wait for no good reason. Note that the Windows Forms team has guaranteed that you can use Control.BeginInvoke in a "fire and forget" manner - i.e. without ever calling EndInvoke. This is not true of async calls...
Validating an XML against referenced XSD in C#
...quires you know the schema beforehand rather than taking the inline schema from the xml.
– Lankymart
Jun 25 '13 at 9:46
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How to match all occurrences of a regex
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Remove the grouping from your_regex = /(\d+)[m-t]/ and you won't need to use flatten. Your final example uses last_match which in this case is probably safe, but is a global and could possibly be overwritten if any regex was matched prior to cal...
What blocks Ruby, Python to get Javascript V8 speed? [closed]
..., not a JIT).
Many also feel that Ruby and Python could benefit immensely from removing their respective global interpreter locks.
You also have to understand that Python and Ruby are both much heavier languages than JS -- they provide far more in the way of standard library, language features, an...
What is the best way to create constants in Objective-C
...ce of the true value of that symbol, so everyone's getting the same string from one place. That's what extern gets you.
– Peter Hosey
Nov 9 '15 at 14:11
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Is there a benefit to defining a class inside another class in Python?
... class cls1(object):
...
class cls2(object):
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Then from another module, you can import Group and refer to these as Group.cls1, Group.cls2 etc. However one might argue that you can accomplish exactly the same (perhaps in a less confusing way) by using a module.
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Why does C++11 not support designated initializer lists as C99? [closed]
... of a braced-init-list, the initializer-clauses, including any that result from pack expansions (17.5.3), are evaluated in the order in which they appear. That is, every value computation and side effect associated with a given initializer-clause is sequenced before every value computation and side...
string c_str() vs. data()
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Quote from ANSI ISO IEC 14882 2003 (C++03 Standard):
21.3.6 basic_string string operations [lib.string.ops]
const charT* c_str() const;
Returns: A pointer to the initial element of an array of length size() + 1 whose...