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In pure functional languages, is there an algorithm to get the inverse function?
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In some cases, yes! There's a beautiful paper called Bidirectionalization for Free! which discusses a few cases -- when your function is sufficiently polymorphic -- where it is possible, completely automatically to derive an inverse function. (It also discusses what makes...
How to refresh an IFrame using Javascript?
...plit("?")[0] + "?_=" + new Date().getTime();
Clearing the src when query strings option is not possible (Data URI):
var wasSrc = iframe.src
iframe.onload = function() {
iframe.onload = undefined;
iframe.src = wasSrc;
}
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Append file contents to the bottom of existing file in Bash [duplicate]
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For single string, use echo like this echo "export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_112" >> ~/.bashrc
– shellbye
Jan 3 '17 at 8:36
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领域驱动设计系列 (四)：事件驱动下 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...void Handle(TEvent e);
}
public class HeadedEvent:Event
{
public string Name { get; set; }
}
如果国际章的妈妈关注这个Event, 我们就实现一个GuoJiZhangMotherEventHandler
public class GuoJiZhangMotherEventHandler : IEventHandler<HeadedEvent>
{
public void Handle...
Xenocode Postbuild 2010 for .NET 混淆工具的详细使用步骤 - 更多技术 - ...
... 6、选中图中所示的那两个复选框
7、点击【Select String】按钮进行设置
8、点击【output 标签】
9, 生成混淆后的文件
如果是安装好文件后 第一次 混淆文件，则需要把我们的 序列号 先导入进...
关于jQuery的AJAX不兼容IE的解决办法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ate().getTime()},
在jQuery手册中是这样描述的：
data Object,String
发送到服务器的数据。将自动转换为请求字符串格式。GET 请求中将附加在 URL 后。
查看 processData 选项说明以禁止此自动转换。必须为 Key/Value 格式。
如果为数组，...
Python argparse: Make at least one argument required
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args = vars(parser.parse_args())
if not any(args.values()):
parser.error('No arguments provided.')
share
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improve this answer
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Explicitly select items from a list or tuple
... myBigList[i] for i in [87, 342, 217, 998, 500] ]
20.6 usec: map(myBigList.__getitem__, (87, 342, 217, 998, 500))
22.7 usec: itemgetter(87, 342, 217, 998, 500)(myBigList)
24.6 usec: list( myBigList[i] for i in [87, 342, 217, 998, 500] )
Note that in Python 3, the 1st was changed to be the same as ...
What is 'Pattern Matching' in functional languages?
...wesome.
Algebraic data types in a nutshell
ML-like functional languages allow you define simple data types called "disjoint unions" or "algebraic data types". These data structures are simple containers, and can be recursively defined. For example:
type 'a list =
| Nil
| Cons of 'a * 'a ...
Can't get Gulp to run: cannot find module 'gulp-util'
On Windows 7, I've installed gulp as explained here: http://markgoodyear.com/2014/01/getting-started-with-gulp/ :
10 Answe...