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String concatenation vs. string substitution in Python
...=10000000)
12.166618871951641
>>> t2.timeit(number=10000000)
5.7813972166853773
>>> t1.timeit(number=1)
1.103492206766532e-05
>>> t2.timeit(number=1)
8.5206360154188587e-06
>>> def so_q_tmp(n):
... return "{d}{q}/{n}".format(d=DOMAIN,q=QUESTIONS,n=n)
...
>>...
Bulk insert with SQLAlchemy ORM
...on()
objects = [
User(name="u1"),
User(name="u2"),
User(name="u3")
]
s.bulk_save_objects(objects)
s.commit()
Here, a bulk insert will be made.
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Is there any difference between “foo is None” and “foo == None”?
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edited Mar 3 '17 at 14:56
answered Aug 25 '08 at 18:38
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How to Calculate Execution Time of a Code Snippet in C++
... it is implementation dependent, but it usually 15 ms as well.
#ifdef _WIN32
#include <Windows.h>
#else
#include <sys/time.h>
#include <ctime>
#endif
/* Remove if already defined */
typedef long long int64; typedef unsigned long long uint64;
/* Returns the amount of milliseconds...
c++ 写日志通用类，可设置日志级别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...TAL 0
#define LEVEL_ERROR 1
#define LEVEL_WARN 2
#define LEVEL_INFO 3
#define LEVEL_VERBOSE 4
#define LEVEL_DEBUG 5
static int nLoggerLevel = LEVEL_INFO;
void SetLoggerLevel(int nLevel);
void Log(int nLevel, LPCSTR func, INT line, LPCTSTR fmt, ...);
static const char * const LOGGER...
How does Django's Meta class work?
...:55
Moon
3,04711 gold badge1212 silver badges4242 bronze badges
answered Apr 27 '12 at 3:04
TadeckTadeck
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How do you build a Singleton in Dart?
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360
Thanks to Dart's factory constructors, it's easy to build a singleton:
class Singleton {
st...
What is the preferred/idiomatic way to insert into a map?
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edited Nov 26 '10 at 18:37
user229044♦
202k3535 gold badges298298 silver badges309309 bronze badges
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In Python, if I return inside a “with” block, will the file still close?
...nusual way of course).
It is also mentioned in one of the examples of PEP-343 which is the specification for the with statement:
with locked(myLock):
# Code here executes with myLock held. The lock is
# guaranteed to be released when the block is left (even
# if via return or by an un...
How to add target=“_blank” to JavaScript window.location?
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273
window.location sets the URL of your current window. To open a new window, you need to use windo...