大约有 40,000 项符合查询结果（耗时：0.0416秒） [XML]
Creating functions in a loop
...cated way which involved using a closure as a "function factory":
def make_f(i):
def f():
return i
return f
and in your loop use f = make_f(i) instead of the def statement.
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What is the use of “assert” in Python?
...eter.
As for disabling them, when running python in optimized mode, where __debug__ is False, assert statements will be ignored. Just pass the -O flag:
python -O script.py
See here for the relevant documentation.
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Python: Tuples/dictionaries as keys, select, sort
...u wish.
For this case, I'd use the following class:
class Fruit:
def __init__(self, name, color, quantity):
self.name = name
self.color = color
self.quantity = quantity
def __str__(self):
return "Name: %s, Color: %s, Quantity: %s" % \
(self.name, self...
Random String Generator Returning Same String [duplicate]
...ce of calls to Convert and Floor and NextDouble):
private readonly Random _rng = new Random();
private const string _chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
private string RandomString(int size)
{
char[] buffer = new char[size];
for (int i = 0; i < size; i++)
{
buffer[i] = _c...
Reverse a string in Python
... for readability and reusability, put the slice in a function
def reversed_string(a_string):
return a_string[::-1]
and then:
>>> reversed_string('a_string')
'gnirts_a'
Longer explanation
If you're interested in the academic exposition, please keep reading.
There is no built-i...
Best way to serialize an NSData into a hexadeximal string
...rsion.h
#import <Foundation/Foundation.h>
@interface NSData (NSData_Conversion)
#pragma mark - String Conversion
- (NSString *)hexadecimalString;
@end
NSData+Conversion.m
#import "NSData+Conversion.h"
@implementation NSData (NSData_Conversion)
#pragma mark - String Conversion
- (NSStr...
How to convert boost path type to string?
... canonical is deprecated in newer versions of Boost boost.org/doc/libs/1_48_0/libs/filesystem/v3/doc/…
– Brian Jack
Nov 30 '14 at 2:59
...
HTML5 Local Storage fallback solutions [closed]
...Gears-based persistent storage.
localstorage: HTML5 draft storage.
whatwg_db: HTML5 draft database storage.
globalstorage: HTML5 draft storage (old spec).
ie: Internet Explorer userdata behaviors.
cookie: Cookie-based persistent storage.
Any of those can be disabled—if, for example, you don...
Best way to test if a row exists in a MySQL table
...ng':
SELECT * FROM test WHERE texte LIKE '%something%' LIMIT 1 with
mysql_num_rows() : 0.039061069488525s. (FASTER)
SELECT count(*) as count FROM test WHERE text LIKE '%something% :
16.028197050095s.
SELECT EXISTS(SELECT 1 FROM test WHERE text LIKE '%something%') :
0.87045907974243s.
SELECT EXIS...
Link to all Visual Studio $ variables
... on my machine. Probably not all macros are defined for others (e.g. OCTAVE_EXECUTABLE), but I wanted to err on the side of inclusiveness here.
For example, this is the first time that I see $(Language) (expanding to C++ for this project) being mentioned outside of the IDE.
$(AllowLocalNetworkLoop...