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Operator overloading in Java
... aspect of Java which comes close to "custom" operator overloading is the handling of + for strings, which either results in compile-time concatenation of constants or execution-time concatenation using StringBuilder/StringBuffer. You can't define your own operators which act in the same way though....
Why are interface variables static and final by default?
Why are interface variables static and final by default in Java?
15 Answers
15
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Center image horizontally within a div
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I don't think this is a good idea, and also I believe there's some caveats like margin: auto is dependent on the containing element having a designated width value.
– Jared Farrish
Jun 12 '12 at 0:50
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Rails: Using build with a has_one association in rails
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The build method signature is different for has_one and has_many associations.
class User < ActiveRecord::Base
has_one :profile
has_many :messages
end
The build syntax for has_many association:
user.messages.build
The build syntax for has_one association:
user.bu...
Error installing mysql2: Failed to build gem native extension
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On Ubuntu/Debian and other distributions using aptitude:
sudo apt-get install libmysql-ruby libmysqlclient-dev
Package libmysql-ruby has been phased out and replaced by ruby-mysql. This is where I found the solution.
If the above command ...
Why is a pure virtual function initialized by 0?
...He also states explicitly that this need not set the vtable entry to NULL, and that doing so is not the best way of implementing pure virtual functions.
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Conventions for exceptions or error codes
...error codes.
The default behaviour of an exception is to unwind the stack and stop the program, if I'm writing a script an and I go for a key that's not in a dictionary it's probably an error, and I want the program to halt and let me know all about that.
If, however, I'm writing a piece of code ...
jQuery trigger file input
...o i tried positioning it outside the viewport by setting position:absolute and top:-100px; and voilà it works.
see http://jsfiddle.net/DSARd/1/
call it a hack.
Hope that works for you.
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Twitter bootstrap 3 two columns full height
...ull-height columns (due to the custom css-table properties which we added) and with ratio 1:3 (Navigation:Content) for medium screen widths and above - (due to bootstrap's default classes: col-md-3 and col-md-9)
NB:
1) In order not to mess up bootstrap's native column classes we add another clas...
Any equivalent to .= for adding to beginning of string in PHP?
...rn $string;
}
}
$string would be the piece that you want to prepend and $chunk would be the text that you want something prepended onto it.
You could say the checks are optional, but by having that in there you don't need to worry about passing in a null value by accident.
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