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How to create an object for a Django model with a many to many field?
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foo.bars.add(bar1, bar2)
As we can see, passing multiple objects saves one SELECT:
SELECT "app_bar"."id", "app_bar"."name" FROM "app_bar" WHERE "app_bar"."id" = 1
SELECT "app_bar"."id", "app_bar"."name" FROM "app_bar" WHERE "app_bar"."id" = 2
INSERT INTO "app_foo" ("name") VALUES ()
SELECT "app...
What does the thread_local mean in C++11?
...from the viewpoint of the functions using it) but in actual fact, there is one copy per thread.
It adds to the current automatic (exists during a block/function), static (exists for the program duration) and dynamic (exists on the heap between allocation and deallocation).
Something that is thread...
nginx showing blank PHP pages
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This fixed it for me. The .conf has one extra configuration parameter missing from _params.
– Malvineous
Jul 6 '13 at 4:12
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Creating a new user and password with Ansible
...-1 <plaintext> to generate the password hash, rather than the Python one-liner you have above. I had some trouble getting correct output from Python, probably due to my own incompetence and the openssl command worked better.
– Brendan Wood
Dec 12 '13 at ...
How do you access the matched groups in a JavaScript regular expression?
...ause it correctly shows iteration over all matches instead of only getting one.
– Rob Evans
May 11 '13 at 12:08
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What parameters should I use in a Google Maps URL to go to a lat-lon?
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Is it possible to add more than one marker to an app? And if it works, how does the structure looks like?
– michael-mammut
May 12 '17 at 14:39
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Combine two columns of text in pandas dataframe
...concatenate them directly:
df["period"] = df["Year"] + df["quarter"]
If one (or both) of the columns are not string typed, you should convert it (them) first,
df["period"] = df["Year"].astype(str) + df["quarter"]
Beware of NaNs when doing this!
If you need to join multiple string columns, y...
.NET obfuscation tools/strategy [closed]
My product has several components: ASP.NET, Windows Forms App and Windows Service. 95% or so of the code is written in VB.NET.
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What does static_assert do, and what would you use it for?
...ary::Version is declared as a static const, rather than being #defined (as one would expect in a C++ library).
Contrast with having to actually compile SomeLibrary and your code, link everything, and run the executable only then to find out that you spent 30 minutes compiling an incompatible versio...
How to execute an external program from within Node.js?
...you are having issues, please post a new question on SO and reference this one if necessary.
– Mark Kahn
Mar 21 '15 at 6:02
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