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Adding two numbers concatenates them instead of calculating the sum
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350
They are actually strings, not numbers. The easiest way to produce a number from a string is to ...
Format timedelta to string
...with str(). Here's an example:
import datetime
start = datetime.datetime(2009,2,10,14,00)
end = datetime.datetime(2009,2,10,16,00)
delta = end-start
print(str(delta))
# prints 2:00:00
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Split a string by spaces — preserving quoted substrings — in Python
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407
You want split, from the built-in shlex module.
>>> import shlex
>>> shlex.s...
How do I make a transparent border with CSS?
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108
You can use "transparent" as a colour. In some versions of IE, that comes up as black, but I've...
PostgreSQL error: Fatal: role “username” does not exist
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806
Use the operating system user postgres to create your database - as long as you haven't set up ...
C#对象序列化与反序列化 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
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(8) 类型继承与反序列化
(9) 排除不需要序列化的成员
(10) 强制指定成员的序列化顺序
(11) 自定义序列化行为
(12) 序列化设置XML命名空间
(13) XML的使用建议
(14) 反序列化的使用总结
6. 自定义序列化(仅适用于二进制与SOAP)
(1) ...
Outlook autocleaning my line breaks and screwing up my email format
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answered Oct 29 '08 at 18:43
Alex BAlex B
23.3k1212 gold badges6060 silver badges8383 bronze badges
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How to grep and replace
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On OS X 10.10 Terminal, a proper extension string to parameter -i is required. For example, find /path/to/files -type f -exec sed -i "" "s/oldstring/new string/g" {} \; Anyway, providing empty string still creates a backup file unlike...
Set NOW() as Default Value for datetime datatype?
...an/5.7/en/timestamp-initialization.html
http://optimize-this.blogspot.com/2012/04/datetime-default-now-finally-available.html
Prior to 5.6.5, you need to use the TIMESTAMP data type, which automatically updates whenever the record is modified. Unfortunately, however, only one auto-updated TIMESTAMP...
Printing 1 to 1000 without loop or conditionals
Task : Print numbers from 1 to 1000 without using any loop or conditional statements. Don't just write the printf() or cout statement 1000 times.
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