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getApplication() vs. getApplicationContext()
... not be the application instance (which you obviously experienced with the test framework).
Why does getApplicationContext() exist in the first place ?
getApplication() is only available in the Activity class and the Service class, whereas getApplicationContext() is declared in the Context class.
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How can I represent an 'Enum' in Python?
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@shahjapan: Interesting, but relatively slow: a test is done for each access like Animals.DOG; also, the values of the constats are strings, so that comparisons with these constants are slower than if, say, integers were allowed as values.
– Eric O Le...
Get selected value of a dropdown's item using jQuery
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the fastest way of getting the text of the selected option is: $("#dropDownId").children("option").filter(":selected").text()
– RickardN
Mar 21 '13 at 10:22
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Check if a method exists
Is there any way I can test if a method exists in Objective-C?
5 Answers
5
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Checking whether a variable is an integer or not [duplicate]
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Your sympy.Rational test doesn't quite do what you're thinking, because sympy.Rational(5) evaluates to an instance of sympy.Integer. Any operation that would produce a Rational with an integer value instead produces an Integer.
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Are tuples more efficient than lists in Python?
...u might expect tuples to be slightly faster. However you should definitely test your specific case (if the difference might impact the performance of your program -- remember "premature optimization is the root of all evil").
Python makes this very easy: timeit is your friend.
$ python -m timeit ...
PostgreSQL return result set as JSON array?
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or combine json_agg with a cast:
SELECT json_agg(t)::jsonb FROM t
My testing suggests that aggregating them into an array first is a little faster. I suspect that this is because the cast has to parse the entire JSON result.
9.2
9.2 does not have the json_agg or to_json functions, so you nee...
jQuery remove all list items from an unordered list
...bs/jquery/3.3.1/jquery.min.js"></script>
<ul>
<li>test</li>
<li>test</li>
</ul>
<input type="button" value="click me" />
http://jsfiddle.net/infernalbadger/D5ss8/
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Get int value from enum in C#
... cases, most of the time, I leave it as default value. but you can do enum Test { Item = 1 } and see that 1 == (int)Test.Item is equal.
– Jaider
Jun 28 '12 at 20:47
35
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Is there a way to list pip dependencies/requirements?
... perusing multiple comments so I am providing an updated answer.
This was tested with pip versions 8.1.2, 9.0.1, 10.0.1, and 18.1.
To get the output without cluttering your current directory on Linux use
pip download [package] -d /tmp --no-binary :all: -v
-d tells pip the directory that downloa...