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What does “abstract over” mean?

...the similarities. We say that we abstract over the differences, but this really means we're integrating by the similarities. For example, consider a program that takes the sum of the numbers 1, 2, and 3: val sumOfOneTwoThree = 1 + 2 + 3 This program is not very interesting, since it's not very a...
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How to convert nanoseconds to seconds using the TimeUnit enum?

... This answer is now wrong - convert() and the toFoo() methods all return longs now docs.oracle.com/javase/6/docs/api/java/util/concurrent/… – Riking Jul 30 '13 at 1:58 ...
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The difference between sys.stdout.write and print?

...ble, but by default with a space between args and newline at the end) and calls the write function of a given object. By default this object is sys.stdout, but you can pass a file using the "chevron" form. For example: print >> open('file.txt', 'w'), 'Hello', 'World', 2+3 See: https://docs....
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How does the @property decorator work in Python?

...is just syntactic sugar; the syntax: @property def foo(self): return self._foo really means the same thing as def foo(self): return self._foo foo = property(foo) so foo the function is replaced by property(foo), which we saw above is a special object. Then when you use @foo.setter(), what you ...
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Python __call__ special method practical example

I know that __call__ method in a class is triggered when the instance of a class is called. However, I have no idea when I can use this special method, because one can simply create a new method and perform the same operation done in __call__ method and instead of calling the instance, you can c...
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How to get a time zone from a location using latitude and longitude coordinates?

... zone from a location. This community wiki is an attempt at consolidating all of the valid responses. 17 Answers ...
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Integrating Dropzone.js into existing HTML form with other fields

...in your form with a classname dropzone, and implement dropzone programmatically. HTML : <div id="dZUpload" class="dropzone"> <div class="dz-default dz-message"></div> </div> JQuery: $(document).ready(function () { Dropzone.autoDiscover = false; $("#dZUpl...
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How do I initialize the base (super) class?

... and invoke their base class through super(), e.g. class X(object): def __init__(self, x): pass def doit(self, bar): pass class Y(X): def __init__(self): super(Y, self).__init__(123) def doit(self, foo): return super(Y, self).doit(foo) Because python knows about old- an...
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Hadoop “Unable to load native-hadoop library for your platform” warning

...e native Hadoop library $HADOOP_HOME/lib/native/libhadoop.so.1.0.0 was actually compiled on 32 bit. Anyway, it's just a warning, and won't impact Hadoop's functionalities. Here is the way if you do want to eliminate this warning, download the source code of Hadoop and recompile libhadoop.so.1.0....
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Add swipe to delete UITableViewCell

... @lase You might want to take a peek at an app called Dash. It enables you to search documentation and it's a lot snappier than browsing the web. It's also stored locally on your computer, so you don't need web access to look stuff up. You can also load up documentation fo...