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What's the difference between Ruby's dup and clone methods?
...zen object is also frozen (whereas a dup of a frozen object isn't).
class Test
attr_accessor :x
end
x = Test.new
x.x = 7
x.freeze
y = x.dup
z = x.clone
y.x = 5 => 5
z.x = 5 => TypeError: can't modify frozen object
Another difference is with singleton methods. Same story here, dup doesn't ...
How to check if a variable is a dictionary in Python?
... your code when there are more flexible, idiomatic expressions.
is is a test for object identity. It does not support inheritance, it does not support any abstraction, and it does not support the interface.
So I will provide several options that do.
Supporting inheritance:
This is the first re...
Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances? [closed]
...use. Or at least a higher speed cable/DSL broadband connection. On my last test ~3Mbps seemed sufficient on the low bandwidth profile (they have multiple bandwidth connection profiles, low, medium, high, optimized for some bandwidth ranges). I didn't test on the higher ones. Your mileage may vary.
...
Why does the MongoDB Java driver use a random number generator in a conditional?
...zed to negative 1:
private int logit = -1;
In the try block, make the test:
if( !ok && (logit = (logit + 1 ) % 10) == 0 ) { //log error
This always logs the first error, then every tenth subsequent error. Logical operators "short-circuit", so logit only gets incremented on an actua...
Apply multiple functions to multiple groupby columns
...
@slackline yes. i just tested it and it works fine. Ted must have just created the frame a few different times and since it was created via random number generation, the df data to actually generate the data was different than the one ultimately us...
Should I use JSLint or JSHint JavaScript validation? [closed]
... advice -- I've seen very few JavaScript codesets that could pass a JSLint test. However with the more pragmatic rules available in today's JSHint and ESLint tools, it is a much more realistic proposition to try to get your code passing through them with zero warnings.
There may still occasionally ...
SHFileOperation函数总结（文件夹的移动、复制、删除） - C/C++ - 清泛网 -...
...用。例如，源文件或目录有两个，则应是：char pFrom[]="d:\\Test1\0d:\\Text.txt\0"，它表示对要D：盘Test目录下的所有文件和D：盘上的Text.txt文件进行操作。字符串中的"\\"是C语言中的'\'的转义符，'\0'则是NULL。wFunc 是结构中的一个非常...
What is the correct way to make a custom .NET Exception serializable?
...
base.GetObjectData(info, context);
}
}
}
Unit Tests
MSTest unit tests for the three exception types defined above.
UnitTests.cs:
namespace SerializableExceptions
{
using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Se...
Where in a virtualenv does the custom code go?
... you have multiple applications using the same virtualenv. Or, you may be testing an application with a virtualenv that will later be deployed with a system Python. Or, you may be packaging up a standalone app where it might make sense to have the virtualenv directory located somewhere within the ...
HTML5: Slider with two inputs possible?
...
@erik I don't really have a good way to test those versions, but it works for me on Android 5.0 with the latest version of Safari (which google play says is 1.2, so I'm confused about your 4.0). If you figure it out, I'd love to know.
– Gary
...