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Approximate cost to access various caches and main memory?
...cles ( 21.4 - 12.0 ns )
local L3 CACHE hit, shared line in another core ~65 cycles ( 34.8 - 19.5 ns )
local L3 CACHE hit, modified in another core ~75 cycles ( 40.2 - 22.5 ns )
remote L3 CACHE (Ref: Fig.1 [Pg. 5]) ~100-300 cycles ( 160.7 - 30.0 ns )
local DRAM ...
Accessing dict keys like an attribute?
...ore).
– Robert Siemer
Apr 27 '15 at 6:13
1
@viveksinghggits just because you are accessing things...
Multiple columns index when using the declarative ORM extension of sqlalchemy
...ave to declare it, everything works the same (make sure you're on recent 0.6 or 0.7 for the declarative A.a wrapper to be interpreted as a Column after the class declaration is complete):
class A(Base):
__tablename__ = 'table_A'
id = Column(Integer, primary_key=True)
a = Column(String(3...
How to watch for array changes?
...
Richie Bendall
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answered Feb 24 '11 at 4:40
canoncanon
...
What is context in _.each(list, iterator, [context])?
...omeOtherArray.
}, someOtherArray);
Working Example: http://jsfiddle.net/a6Rx4/
It uses the number from each member of the Array being iterated to get the item at that index of someOtherArray, which is represented by this since we passed it as the context parameter.
If you do not set the context,...
Import a file from a subdirectory?
...
Take a look at the Packages documentation (Section 6.4) here: http://docs.python.org/tutorial/modules.html
In short, you need to put a blank file named
__init__.py
in the "lib" directory.
share
...
Using OR in SQLAlchemy
...ice', 'Bob', 'Carl')))
– robru
Aug 26 '15 at 20:21
69
@Robru's advice is unnecessarily inefficien...
Running single test from unittest.TestCase via command line
...
phihagphihag
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...
How do I use PHP namespaces with autoload?
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edited Nov 6 '16 at 20:11
answered Dec 9 '09 at 1:35
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namedtuple and default values for optional keyword arguments
...gt;>> Node()
Node(val=None, left=None, right=None)
Before Python 2.6
Set Node.__new__.func_defaults to the default values.
>>> from collections import namedtuple
>>> Node = namedtuple('Node', 'val left right')
>>> Node.__new__.func_defaults = (None,) * len(Node._...