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What is the difference between class and instance attributes?
...name
def __get__(self, obj, objtype):
return self.val
class Base(object):
attr_1 = RevealAccess(10, 'var "x"')
def __init__(self):
self.attr_2 = RevealAccess(10, 'var "x"')
def main():
b = Base()
print("Access to class attribute, return: ", Base.attr_1)
...
How does lucene index documents?
... (again, much like B-Trees).
So once the inverted (term) index - which is based on a Skip-List data structure - is built from the documents, the index is stored on disk. Lucene then loads (as already said: possibly, only some of) those terms into a Finite State Transducer, in an FST implementation ...
Do while loop in SQL Server 2008
...AK;
END
GO
ResultSet:
1
2
3
4
5
But try to avoid loops at database level.
Reference.
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sqlalchemy unique across multiple columns
...ble.c.location_code, unique=True)
# version2: declarative
class Location(Base):
__tablename__ = 'locations'
id = Column(Integer, primary_key = True)
customer_id = Column(Integer, ForeignKey('customers.customer_id'), nullable=False)
location_code = Column(Unicode(10), nullable=False...
__init__ for unittest.TestCase
...
You are overriding the TestCase's __init__, so you might want to let the base class handle the arguments for you.
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How to create NS_OPTIONS-style bitmask enumerations in Swift?
...et ThirdOption = MyOptions(rawValue: 1 << 2)
}
Now we can use set-based semantics with MyOptions:
let singleOption = MyOptions.FirstOption
let multipleOptions: MyOptions = [.FirstOption, .SecondOption]
if multipleOptions.contains(.SecondOption) {
print("multipleOptions has SecondOption...
git cherry-pick says “…38c74d is a merge but no -m option was given”
...m option. For example, git cherry-pick -m 1 fd9f578 to use parent 1 as the base.
I can't say for sure for your particular situation, but using git merge instead of git cherry-pick is generally advisable. When you cherry-pick a merge commit, it collapses all the changes made in the parent you didn't...
PostgreSQL: Modify OWNER on all tables simultaneously in PostgreSQL
How do I modify the owner of all tables in a PostgreSQL database?
20 Answers
20
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Java: Multiple class declarations in one file
... @BoomerRogers: No, this is definitely not the "core basis of component based programming". If you're programming against a component, why would you care how the source code is organized? (Personally I prefer dependency injection rather than the service locator pattern, but that's a different mat...
Benefits of prototypal inheritance over classical?
...e:
Classes.
Object.
Interfaces.
Abstract Classes.
Final Classes.
Virtual Base Classes.
Constructors.
Destructors.
You get the idea. The point is that prototypal inheritance is easier to understand, easier to implement, and easier to reason about.
As Steve Yegge puts it in his classical blog pos...