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sqlalchemy: how to join several tables by one query?
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@pate I'm not sure what you mean by 'what is query set to', but it will join according the relations, and the yield 3-tuples. The arguments to the query() call are essentially the select list in sqlalchemy.
– letitbee
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What's the difference between struct and class in .NET?
...ning a value type contains the entire value type value. For a struct, that means that the variable contains the entire struct, with all its fields.
A variable containing a reference type contains a pointer, or a reference to somewhere else in memory where the actual value resides.
This has one ben...
Postgresql SELECT if string contains
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shouldn't be the order of aaaa and tag_name reversed? i mean that you should put a column name after where
– user151496
May 11 '15 at 15:10
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back button callback in navigationController in iOS
...n having a done or save button at the right-side).
– meaning-matters
Apr 25 '13 at 19:34
7
Or whe...
How to add Action Bar from support library into PreferenceActivity?
...}
Result:
AppCompat 22.1
AppCompat 22.1 introduced new tinted elements, meaning that there is no longer a need to utilise the internal classes to achieve the same effect as the last update. Instead follow this (still overriding onCreateView):
@Override
public View onCreateView(String name, Contex...
What is the Difference Between Mercurial and Git?
.... Try taking a peek at the git-instaweb.sh file if you want to know what I mean: it is a shell script which generates a Ruby script, which I think runs a webserver. The shell script generates another shell script to launch the first Ruby script. There is also a bit of Perl, for good measure.
I like...
What are the differences between double-dot “..” and triple-dot “…” in Git diff commit ranges?
...the commit graph. The .. and ... notations in git diff have the following meanings:
# Left side in the illustration below:
git diff foo..bar
git diff foo bar # same thing as above
# Right side in the illustration below:
git diff foo...bar
git diff $(git merge-base foo bar) bar # same thing as ab...
Difference between exit(0) and exit(1) in Python
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0 and 1 are the exit codes.
exit(0) means a clean exit without any errors / problems
exit(1) means there was some issue / error / problem and that is why the program is exiting.
This is not Python specific and is pretty common. A non-zero exit code is treated...
How to use LocalBroadcastManager?
... this observer is bound to the Lifecycle object associated with the owner, meaning:
If the Lifecycle object is not in an active state, then the observer
isn't called even if the value changes.
After the Lifecycle object is destroyed, the observer is
automatically removed
The fact that LiveData o...
How to choose the id generation strategy when using JPA and Hibernate
...deep migration on the system exposing its internal keys. Exposing your key means exposing a fundamental aspect of your code to external constrains shouldn’t really be exposed to.
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