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How exactly does a generator comprehension work?
... 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
>>> # compare to...
Reimport a module in python while interactive
...but if the new version of a module does not define a name that was defined by the old version, the old definition is not removed.
If a module imports objects from another module using from ... import ..., calling reload() for the other module does not redefine the objects imported from it — one wa...
Unicode characters in URLs
... You can use the unencoded UTF-8 URLs, namely IRIs, in HTML5 documents by now. If you do that, all major browsers will understand it and display it correctly in their address bar.
– Oliver
Oct 23 '13 at 12:54
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View's SELECT contains a subquery in the FROM clause
...nt_id, sum(credits_used) as credits_used
from credit_usage
group by client_id
create view view_credit_status as
select
credit_orders.client_id,
sum(credit_orders.number_of_credits) as purchased,
ifnull(t1.credits_used,0) as used
from credit_orders
...
How do I undo “Scope to this” in Visual Studio 2012?
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Click the "Home" icon (third one by default, the one with a house pictogram) in the Solution explorer. This will revert the view to the full solution.
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How can you do anything useful without mutable state?
...d around is stateless coding. It seems to me that simplifying programming by removing mutable state is like "simplifying" a car by removing the dashboard: the finished product may be simpler, but good luck making it interact with end-users.
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I just discovered why all ASP.Net websites are slow, and I am trying to work out what to do about it
...ome thread-safe, if it doesn't use locks?
Edit: I should probably explain by what I mean by "opt out of most of this lock". Any number of read-only-session or no-session pages can be processed for a given session at the same time without blocking each other. However, a read-write-session page can't...
Convert base-2 binary number string to int
... And note that in an interactive REPL session (as suggested by the >>> prompt), you don't need to use print at all. The OP's hypothetical example didn't. So it really should be identical in Python 2 and 3.
– John Y
Jul 12 '16 at 22:36
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How to copy Java Collections list
...OfBoundsException. The expectation is that no allocations will be required by Collections.copy to work, and if any are, then it throws that exception. It's an optimization to require the copied collection to be preallocated (b), but I generally do not think that the feature is worth it due to the re...
rotating axis labels in R
...I have larger numbers as axis tick labels, it is nice to have them rotated by around 45 degrees to strike a good balance between readability (horizontal) and space efficiency (vertical).
– jmb
Aug 25 '19 at 19:31
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