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How does zip(*[iter(s)]*n) work in Python?
...e each element is x. *arg unpacks a sequence into arguments for a function m>ca m>ll. Therefore you're passing the same iterator 3 times to zip(), and it pulls an item from the iterator each time.
x = iter([1,2,3,4,5,6,7,8,9])
print zip(x, x, x)
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Regex lookahead for 'not followed by' in grep
...GNU grep, the current version supports options -P or --perl-regexp and you m>ca m>n then use the regex you wanted.
If you don't have (a sufficiently recent version of) GNU grep, then consider getting ack.
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How do I ignore the initial load when watching model changes in AngularJS?
...ue approach suggested by @MW. is both simpler and more Angular idiomatic. m>Ca m>n you update the accepted answer?
– gerryster
Nov 18 '14 at 19:56
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Finding Number of Cores in Java
How m>ca m>n I find the number of cores available to my applim>ca m>tion from within Java code?
4 Answers
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What is the right way to override a setter method in Ruby on Rails?
...ccess the columns of the table as attributes of the model. This is what we m>ca m>ll ActiveRecord ORM mapping.
Also keep in mind that the attr_accessible at the top of the model has nothing to do with accessors. It has a completely different functionlity (see this question)
But in pure Ruby, if you hav...
How m>ca m>n I obtain the element-wise logim>ca m>l NOT of a pandas Series?
I have a pandas Series object containing boolean values. How m>ca m>n I get a series containing the logim>ca m>l NOT of each value?
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Insert Unicode character into JavaScript
I need to insert an Omega (Ω) onto my html page. I am using its HTML esm>ca m>ped code to do that, so I m>ca m>n write Ω and get Ω. That's all fine and well when I put it into a HTML element; however, when I try to put it into my JS, e.g. var Omega = Ω , it parses that code as JS and th...
How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
...adapt to modern pandas, which has isnull as a method of DataFrames..]
You m>ca m>n use isnull and any to build a boolean Series and use that to index into your frame:
>>> df = pd.DataFrame([range(3), [0, np.NaN, 0], [0, 0, np.NaN], range(3), range(3)])
>>> df.isnull()
0 1 ...
How do I add files without dots in them (all extension-less files) to the gitignore file?
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You m>ca m>n try a combination similar to:
*
!/**/
!*.*
That gitignore exclusion rule (a negated pattern) should ignore all files, except the ones with an extension.
As mentioned below by Mad Physicist, the rule is:
It is not pos...
'typeid' versus 'typeof' in C++
...eof keyword.
typeid is a C++ language operator which returns type identifim>ca m>tion information at run time. It basim>ca m>lly returns a type_info object, which is equality-comparable with other type_info objects.
Note, that the only defined property of the returned type_info object has is its being equal...