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Should I implement __ne__ in terms of __eq__ in Python?
...oes not imply that x!=y
is false. Accordingly, when defining
__eq__(), one should also define __ne__() so that the operators will behave as expected.
In a lot of cases (such as this one), it will be as simple as negating the result of __eq__, but not always.
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Hidden features of Eclipse [closed]
...he commands listed here. I took time to figure this out. It might help someone.
– 500865
Oct 23 '11 at 3:27
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List of lists changes reflected across sublists unexpectedly
...fix it, you need to make sure that you create a new list at each position. One way to do it is
[[1]*4 for _ in range(3)]
which will reevaluate [1]*4 each time instead of evaluating it once and making 3 references to 1 list.
You might wonder why * can't make independent objects the way the list...
Check if two unordered lists are equal [duplicate]
... the cleanest approach here. I think this answer ought to be the accepted one.
– Will
Oct 24 '13 at 11:05
2
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Can an Option in a Select tag carry multiple values?
...
One way to do this, first one an array, 2nd an object:
<select name="">
<option value='{"num_sequence":[0,1,2,3]}'>Option one</option>
<option value='{"foo":"bar","one":"two"}'>Opt...
How to check if an activity is the last one in the activity stack for an application?
...ecated, from API 21 it's better to follow raukodraug answer or Ed Burnette one (I would prefer second one).
There's possibility to check current tasks and their stack using ActivityManager.
So, to determine if an activity is the last one:
request android.permission.GET_TASKS permissions in the ...
Algorithm to generate a crossword
...e a number of crosswords and then compare their scores and choose the best one.
Instead of running an arbitrary number of iterations, I've decided to create as many crosswords as possible in an arbitrary amount of time. If you only have a small word list, then you'll get dozens of possible crosswo...
Does Python support multithreading? Can it speed up execution time?
...
The GIL does not prevent threading. All the GIL does is make sure only one thread is executing Python code at a time; control still switches between threads.
What the GIL prevents then, is making use of more than one CPU core or separate CPUs to run threads in parallel.
This only applies to Py...
Intersection of two lists in Bash
...ts found in two lists. To simplify, let's use ls as an example. Imagine "one" and "two" are directories.
6 Answers
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How exactly does a generator comprehension work?
...king them into list, it waits, and yields each item out of the expression, one by one.
>>> my_list = [1, 3, 5, 9, 2, 6]
>>> filtered_list = [item for item in my_list if item > 3]
>>> print(filtered_list)
[5, 9, 6]
>>> len(filtered_list)
3
>>> # compar...