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Creating an Android trial application that expires after a fixed time period
...e if the trial period has ended. This is easy to circumvent because uninstalling and reinstalling will allow the user to have another trial period.
The second approach is harder to circumvent, but still circumventable. Use a hard coded time bomb. Basically with this approach you will be hard cod...
How do you make a HTTP request with C++?
Is there any way to easily make a HTTP request with C++? Specifically, I want to download the contents of a page (an API) and check the contents to see if it contains a 1 or a 0. Is it also possible to download the contents into a string?
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How to properly compare two Integers in Java?
...ystem.out.println(x == y);
is guaranteed to print false. Interning of "small" autoboxed values can lead to tricky results:
Integer x = 10;
Integer y = 10;
System.out.println(x == y);
This will print true, due to the rules of boxing (JLS section 5.1.7). It's still reference equality being used,...
Named regular expression group “(?Pregexp)”: what does “P” stand for?
In Python, the (?P<group_name>…) syntax allows one to refer to the matched string through its name:
3 Answers
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What is the difference between `sorted(list)` vs `list.sort()`?
...sorts the list in-place, mutating the list indices, and returns None (like all in-place operations).
sorted() works on any iterable, not just lists. Strings, tuples, dictionaries (you'll get the keys), generators, etc., returning a list containing all elements, sorted.
Use list.sort() when you wa...
Setting Short Value Java
... foo = (byte)0;
short bar = (short)0;
In your setLongValue(100L) method call, you don't have to necessarily include the L suffix because in this case the int literal is automatically widened to a long. This is called widening primitive conversion in the Java Language Specification.
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Difference between class and type
...able of reference type always holds the value of a reference to an object. All objects, including arrays, support the methods of class Object. The reference types are class types (including enum types), interface types, and array types.
Every piece of data has a type which defines its structure, ...
How do I remove code duplication between similar const and non-const member functions?
... C &>(*this).get());
}
char c;
};
The two casts and function call may be ugly but it's correct. Meyers has a thorough explanation why.
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How to use a class from one C# project with another C# project
...that you wish to access directly must have a sufficient access level: typically this means they must be made public.
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Why do some functions have underscores “__” before and after the function name?
...rms using leading or trailing underscores are
recognized (these can generally be combined with any case convention):
_single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import objects whose name starts with an underscore.
single_trailing_underscore_: ...