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Bulk insert with SQLAlchemy ORM
...tly, we can produce an INSERT that is
competitive with using the raw database API directly.
Alternatively, the SQLAlchemy ORM offers the Bulk Operations suite of
methods, which provide hooks into subsections of the unit of work
process in order to emit Core-level INSERT and UPDATE constru...
Create an instance of a class from a string
Is there a way to create an instance of a class based on the fact I know the name of the class at runtime. Basically I would have the name of the class in a string.
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Abstract methods in Python [duplicate]
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Before abc was introduced you would see this frequently.
class Base(object):
def go(self):
raise NotImplementedError("Please Implement this method")
class Specialized(Base):
def go(self):
print "Consider me implemented"
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Differences between Java 8 Date Time API (java.time) and Joda-Time
...lds. A common feature of both field implementation design is that both are based on values of type long (no other types, not even enums).
Enum
JSR-310 offers enums like DayOfWeek or Month while Joda-Time does not offer this because it was mainly developed in years 2002-2004 before Java 5.
Zone AP...
Why are Docker container images so large?
...dependencies for what you installed. It is also important to note that the base images (like fedora:latest tend to be very bare-bones. You may be surprised by the number of dependencies your installed software has.
I was able to make your installation significantly smaller by adding yum -y clean al...
Selecting data frame rows based on partial string match in a column
I want to select rows from a data frame based on partial match of a string in a column, e.g. column 'x' contains the string "hsa". Using sqldf - if it had a like syntax - I would do something like:
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MySQL - UPDATE query based on SELECT Query
... check (from the same table) if there is an association between two events based on date-time.
11 Answers
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Select multiple records based on list of Id's with linq
...aining Id's of my UserProfile table. How can i select all UserProfiles based on the list of Id's i got in a var using LINQ ?
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What is the maximum value for an int32?
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If you think the value is too hard to remember in base 10, try base 2:
1111111111111111111111111111111
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answered Jun 1 '10 at...
Why is the C++ STL is so heavily based on templates? (and not on *interfaces*)
... @einpoklum And what exactly would you gain from an abstract base class? Take std::set as an example. It does not inherit from an abstract base class. How does that limit your usage of std::set? Is there anything you cannot do with a std::set because it does not inherit from an abstrac...