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Having both a Created and Last Updated timestamp columns in MySQL 4.0
...
That has changed (at least in MySQL 5.0). See the documentation: dev.mysql.com/doc/refman/5.0/en/timestamp.html
– SimonSimCity
Jan 21 '12 at 11:32
...
What are the correct version numbers for C#?
...e COM support, named arguments, tuple data type and optional parameters
C# 5.0 released with .NET 4.5 and VS2012 (August 2012). Major features: async programming, caller info attributes. Breaking change: loop variable closure.
C# 6.0 released with .NET 4.6 and VS2015 (July 2015). Implemented by Rosl...
What is the difference between '/' and '//' when used for division?
...es Python 2.x to adopt the 3.x behavior.
Regardless of the future import, 5.0 // 2 will return 2.0 since that's the floor division result of the operation.
You can find a detailed description at https://docs.python.org/whatsnew/2.2.html#pep-238-changing-the-division-operator
...
Get operating system info
... xp/i' => 'Windows XP',
'/windows nt 5.0/i' => 'Windows 2000',
'/windows me/i' => 'Windows ME',
'/win98/i' => 'Windows 98',
'/win95/i' ...
How to find the operating system version using JavaScript?
...atform = Win32
# appCodeName = Mozilla
# appName = Netscape
# appVersion = 5.0 (Windows; en-US)
# language = en-US
# mimeTypes = [object MimeTypeArray]
# oscpu = Windows NT 5.1
# vendor = Firefox
# vendorSub = 1.0.7
# product = Gecko
# productSub = 20050915
# plugins = [object PluginArray]
# securit...
What's the best way to add a drop shadow to my UIView
...= [UIColor blackColor].CGColor;
view.layer.shadowOffset = CGSizeMake(0.0f, 5.0f);
view.layer.shadowOpacity = 0.5f;
view.layer.shadowPath = shadowPath.CGPath;
First of all: The UIBezierPath used as shadowPath is crucial. If you don't use it, you might not notice a difference at first, but the keen...
Python - abs vs fabs
...t fabs(-5)
10000000 loops, best of 3: 114 ns per loop
In [6]: %timeit abs(5.0)
10000000 loops, best of 3: 92.5 ns per loop
In [7]: %timeit fabs(5.0)
10000000 loops, best of 3: 93.2 ns per loop
In [8]: %timeit abs(-5.0)
10000000 loops, best of 3: 91.8 ns per loop
In [9]: %timeit fabs(-5.0)
100000...
Hidden Features of MySQL
...of concurrent connections. The default value is 100 connections (151 since 5.0) - very small.
Note:
connections take memory and your OS might not be able to handle a lot of connections.
MySQL binaries for Linux/x86 allow you to have up to 4096 concurrent connections, but self compiled binaries ...
How is the default max Java heap size determined?
...s physical memory on the machine or some
reasonable minimum. Before J2SE 5.0,
the default initial heap size was a
reasonable minimum, which varies by
platform. You can override this
default using the -Xms command-line
option.
maximum heap size:
Smaller of 1/4th of the physical ...
js/php判断终端类型：PC访问、手机访问、微信访问 - 更多技术 - 清泛网 - ...
...
}
}
原理：
微信在 Android 下的 User Agent ：
mozilla/5.0 (linux; u; android 4.1.2; zh-cn; mi-one plus build/jzo54k) applewebkit/534.30 (khtml, like gecko) version/4.0 mobile safari/534.30 micromessenger/5.0.1.352
微信在 iPhone 下的 User Agent
mozilla/5.0 (iphone; cp...