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Java default constructor
What exactly is a default constructor — can you tell me which one of the following is a default constructor and what differentiates it from any other constructor?
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How does the keyword “use” work in PHP and can I import classes with it?
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use doesn't include anything. It just imports the specified namespace (or class) to the current scope
If you want the classes to be autoloaded - read about autoloading
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Use of “this” keyword in formal parameters for static methods in C#
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This is an extension method. See here for an explanation.
Extension methods allow developers to add new methods to the public
contract of an existing CLR type, without having to sub-class it or
recompile the original type. Extension Methods help blend the...
Ruby: extend self
...to make instance methods into class methods. But you can also use it as a more efficient singleton.
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What is the best way to check for Internet connectivity using .NET?
What is the fastest and most efficient way to check for Internet connectivity in .NET?
27 Answers
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How does push notification technology work on Android?
How has Google implemented their push notification feature? Does it work through polling done by a service running in the background or in a different way?
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What's invokedynamic and how do I use it?
...know what it is and how does it make reflective programming in Java easier or better?
4 Answers
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bash HISTSIZE vs. HISTFILESIZE?
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Short answer:
HISTSIZE is the number of lines or commands that are stored in memory in a history list while your bash session is ongoing.
HISTFILESIZE is the number of lines or commands that (a) are allowed in the history fil...
jquery $(window).width() and $(window).height() return different values when viewport has not been r
... and $(window).height() to position and size elements based on the viewport size.
4 Answers
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Correct use of flush() in JPA/Hibernate
I was gathering information about the flush() method, but I'm not quite clear when to use it and how to use it correctly. From what I read, my understanding is that the contents of the persistence context will be synchronized with the database, i. e. issuing outstanding statements or refreshing enti...