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Should I implement __ne__ in terms of __eq__ in Python?
...lly redundant to the one before it, I'm including them to demonstrate that order does not matter when one is a subclass of the other.)
These instances have __ne__ implemented with ==:
assert not right1 == right2
assert not right2 == right1
assert right1 != right2
assert right2 != right1
These in...
Tactics for using PHP in a high-load site
... bandwidth is very cheap (bigger disks) whereas multiple prepare I/O's are orders of magnitude more expensive (more servers).
INDEXING
Make sure that your queries utilize at least one index. Beware though, that indexes will cost you if you write or update frequently. There are some experimental tr...
Is there YAML syntax for sharing part of a list or map?
...specified once per node. Secondly, when using a sequence as the value, the order is significant. This doesn't matter in the example here, since there aren't associated values, but it's worth being aware.
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A beginner's guide to SQL database design [closed]
...n:
Keep different types of data separate - don't store addresses in your order table, link to an address in a separate addresses table, for example.
I personally like having an integer or long surrogate key on each table (that holds data, not those that link different tables together, e,g., m:n re...
gradle build fails on lint task
... // if true, show all locations for an error, do not truncate lists, etc.
showAll true
// Fallback lint configuration (default severities, etc.)
lintConfig file("default-lint.xml")
// if true, generate a text report of issues (false by default)
textRepor...
Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.
...ock, for example), not an Inet one, no matter if localhost is declared in /etc/hosts or not. However, when you use an ip address instead, even 127.0.0.1, you force mysql to open an Inet socket instead.
– Fran Marzoa
Nov 19 '14 at 13:57
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How can I create a Makefile for C projects with SRC, OBJ, and BIN subdirectories?
...$@ $(LFLAGS) $(OBJECTS)
@echo "Linking complete!"
Once that's all in order, you might consider more sophisticated dependency handling; if you modify one of the header files, this makefile will not know which objects/executables must be rebuilt. But that can wait for another day.
EDIT:
Sorry, ...
C++ SpinLock 自旋锁的代码实现（全网最简略的方式） - C/C++ - 清泛网 - ...
...) {}
virtual ~SpinLock() {}
void lock() { while(f_.test_and_set(memory_order_acquire)); }
void unlock() { f_.clear(memory_order_release); }
};
2、有退避策略的自旋锁，尝试一定次数(65535)失败后让出线程调度权：
class SpinLockWithYield {
atomic_flag f_;
public...
Java packages com and org
... by non-profit organizations or for open source code, such as apache, w3c, etc.
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Get all object attributes in Python? [duplicate]
Is there a way to get all attributes/methods/fields/etc. of an object in Python?
4 Answers
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