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Look up all descendants of a class in Ruby
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edited Apr 26 '12 at 10:57
answered Mar 6 '10 at 19:04
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Javascript: Setting location.href versus location
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You might set location directly because it's slightly shorter. If you're trying to be terse, you can usually omit the window. too.
URL assignments to both location.href and location are defined to work in JavaScript 1.0, back in Netscape 2, and have been implement...
explicit casting from super class to subclass
...dog = (Dog) animal; does not generate a compilation error, but at runtime it generates a ClassCastException . Why can't the compiler detect this error?
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Should I use string.isEmpty() or “”.equals(string)?
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The main benefit of "".equals(s) is you don't need the null check (equals will check its argument and return false if it's null), which you seem to not care about. If you're not worried about s being null (or are otherwise checking for it)...
Install tkinter for Python
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It is not very easy to install Tkinter locally to use with system-provided Python. You may build it from sources, but this is usually not the best idea with a binary package-based distro you're apparently running.
It's safer...
Round a Floating Point Number Down to the Nearest Integer?
As the title suggests, I want to take a floating point number and round it down to the nearest integer. However, if it's not a whole, I ALWAYS want to round down the variable, regardless of how close it is to the next integer up. Is there a way to do this?
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Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
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Iterator.remove() is safe, you can use it like this:
List<String> list = new ArrayList<>();
// This is a clever way to create the iterator and call iterator.hasNext() like
// you would do in a while-loop. It wou...
CoffeeScript on Windows?
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edited May 23 '17 at 12:26
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answered Oct 11 '10 at ...
Initializing a static std::map in C++
What is the right way of initializing a static map? Do we need a static function that will initialize it?
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wkhtmltopdf: cannot connect to X server
...ctly, but through many requests by developers to have this run on servers without GUI, I am pretty sure it runs a virtual X server in the static version . I have been using the static (stand-alone) version of the program and it works great! I would put the executable file in a folder, and run:
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