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Check if object is file-like in Python
...cts in Python that behave like a real file, e.g. have a read() and a write m>me m>thod(), but have a different implem>me m>ntation. It is and realization of the Duck Typing concept.
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Checking whether a variable is an integer or not [duplicate]
...like an int, instead of mandating that it be one.
BUT
The classical Python m>me m>ntality, though, is that it's easier to ask forgiveness than permission. In other words, don't check whether x is an integer; assum>me m> that it is and catch the exception results if it isn't:
try:
x += 1
except TypeError:
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Checking network connection
...
Perhaps you could use som>me m>thing like this:
import urllib2
def internet_on():
try:
urllib2.urlopen('http://216.58.192.142', tim>me m>out=1)
return True
except urllib2.URLError as err:
return False
Currently, 216.58.192...
What is the difference between display: inline and display: inline-block?
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A visual answer
Imagine a <span> elem>me m>nt inside a <div>. If you give the <span> elem>me m>nt a height of 100px and a red border for example, it will look like this with
display: inline
display: inline-block
display: block
Code: http://jsfiddle....
How to fluently build JSON in Java?
I'm thinking of som>me m>thing like:
9 Answers
9
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Red black tree over avl tree
...s and they support insertion, deletion and look-up in guaranteed O(logN) tim>me m>. However, there are following points of comparison between the two:
AVL trees are more rigidly balanced and hence provide faster look-ups. Thus for a look-up intensive task use an AVL tree.
For an insert intensive tasks,...
Change private static final field using Java reflection
...vate static final field that, unfortunately, I need to change it at run-tim>me m>.
11 Answers
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Progress indicator during pandas operations
I regularly perform pandas operations on data fram>me m>s in excess of 15 million or so rows and I'd love to have access to a progress indicator for particular operations.
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What should my Objective-C singleton look like? [closed]
My singleton accessor m>me m>thod is usually som>me m> variant of:
26 Answers
26
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NOT IN vs NOT EXISTS
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I always default to NOT EXISTS.
The execution plans may be the sam>me m> at the mom>me m>nt but if either column is altered in the future to allow NULLs the NOT IN version will need to do more work (even if no NULLs are actually present in the data) and the semantics of NOT IN if NULLs are present a...