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Class method differences in Python: bound, unbound and static
...calls the __get__() method of the CPO to access the value it contains.
In order to determine if a CPO is a descriptor, python interpretor checks if it implements the descriptor protocol. To implement descriptor protocol is to implement 3 methods
def __get__(self, instance, owner)
def __set__(self,...
What is the instanceof operator in JavaScript?
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In order to get the prototype link, use Object.getPrototypeOf(o), this will be the same as the __proto__you describe, but conforms to ECMAScript.
– froginvasion
Jul 30 '14 at 9:33
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What are the use cases of Graph-based Databases (http://neo4j.org/)? [closed]
...hs). I've been playing around with neo4j, and my lookup times are several orders of magnitude faster when I need this kind of lookup.
Second, to the point that graph databases are outdated. Um...no. Early on, as people were trying to figure out how to store and lookup data efficiently, they crea...
Decorators with parameters?
...turn repl
return layer
This can be applied to a regular decorator in order to add parameters. So for instance, say we have the decorator which doubles the result of a function:
def double(f):
def aux(*xs, **kws):
return 2 * f(*xs, **kws)
return aux
@double
def function(a):
...
How to set versionName in APK filename using gradle?
...e teacher of the course: "there is an option where you can use commands in order to change the name of the generated files". Therefore, the approach to use from Xamarin must be different to the one I wrote for Android Studio, sorry.
– Fer
Dec 2 '16 at 9:38
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Remove characters except digits from string using Python?
...op
is 50% slower than RE, so the .translate approach beats it by over an order of magnitude.
In Python 3, or for Unicode, you need to pass .translate a mapping (with ordinals, not characters directly, as keys) that returns None for what you want to delete. Here's a convenient way to express this ...
How to copy a row and insert in same table with a autoincrement field in MySQL?
... AND table_name = _tableName AND FIND_IN_SET(COLUMN_NAME,@omitColumns) = 0 ORDER BY ORDINAL_POSITION INTO @columns;
SET @sql = CONCAT('INSERT INTO ', _tableName, '(', @columns, ')',
'SELECT ', @columns,
' FROM ', _schemaName, '.', _tableName, ' ', _whereClause);
PREPARE stmt1 FROM @sql;
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What is the difference between “ is None ” and “ ==None ”
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Find UNC path of a network drive?
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Understanding the difference between __getattr__ and __getattribute__
...est' superclass (formally, the next class in the class's Method Resolution Order, or MRO) to the current object self and then calls it and lets that do the work.
All of this trouble is avoided by using __getattr__ which lets Python do it's normal thing until an attribute isn't found. At that point,...