大约有 16,000 项符合查询结果（耗时：0.0188秒） [XML]
Optimal way to concatenate/aggregate strings
...r < 1000
BEGIN
insert into @YourTable VALUES (ROUND(@counter/10,0), CONVERT(NVARCHAR(50), @counter) + 'CC')
SET @counter = @counter + 1;
END
SET @startTime = GETDATE()
;WITH Partitioned AS
(
SELECT
ID,
Name,
ROW_NUMBER() OVER (PARTITION BY ID ORDER BY Name) ...
How to save an image locally using Python whose URL address I already know?
... urllib2
import shutil
import requests
from urlparse import urljoin
import sys
import time
def make_soup(url):
req = urllib2.Request(url, headers={'User-Agent' : "Magic Browser"})
html = urllib2.urlopen(req)
return BeautifulSoup(html, 'html.parser')
def get_images(url):
soup = mak...
printf() formatting for hex
...
¶6 The flag characters and their meanings are:
...
# The result is converted to an "alternative form". ... For x (or X)
conversion, a nonzero result has 0x (or 0X) prefixed to it. ...
(Emphasis added.)
Note that using %#X will use upper-case letters for the hex digits and 0X as the pr...
What exactly is Type Coercion in Javascript?
... when the operands of an operator are different types, one of them will be converted to an "equivalent" value of the other operand's type. For instance, if you do:
boolean == integer
the boolean operand will be converted to an integer: false becomes 0, true becomes 1. Then the two values are comp...
android get all contacts
...
Get contacts info , photo contacts , photo uri and convert to Class model
1). Sample for Class model :
public class ContactModel {
public String id;
public String name;
public String mobileNumber;
public Bitmap photo;
public Uri ...
How do I create a variable number of variables?
...ny object, you can still use setattr() inside your current module:
import sys
current_module = module = sys.modules[__name__] # i.e the "file" where your code is written
setattr(current_module, 'variable_name', 15) # 15 is the value you assign to the var
print(variable_name) # >>> 15, c...
Checking a Python module version at runtime
...ersion__ the following is ugly but works:
#!/usr/bin/env python3.6
import sys
import os
import subprocess
import re
sp = subprocess.run(["pip3", "show", "numpy"], stdout=subprocess.PIPE)
ver = sp.stdout.decode('utf-8').strip().split('\n')[1]
res = re.search('^Version:\ (.*)$', ver)
print(res.group...
Calculating Pearson correlation and significance in Python
...n is defined on a 2xN matrix. There is no generally applicable method that converts two dictionaries into a 2xN matrix, but you might use the array of pairs of dictionary values corresponding to the keys of the intersection of the keys of your dictionaries.
– winerd
...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...types a special case.
Also note that there is an exception if any type is converted to a signed type and the old value can no longer be represented. The behavior is then merely implementation-defined, although a signal may be raised.
C11 6.3.1.3
6.3.1.3 Signed and unsigned integers
Whe...
优惠券批量生成及导入的思路 - 闲聊区 - 清泛IT论坛，有思想、有深度
... mt_rand(0, PHP_INT_MAX);
$m = base_convert($m, 10, 36); // 主随机
$n = base_convert($n, 10, 36); // 辅随机
$r = substr($m . $n, 0, 16);
} whi...