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Wrap a delegate in an IEqualityComparer
Several Linq.Enumerable functions take an IEqualityComparer<T> . Is there a convenient wrapper class that adapts a delegate(T,T)=>bool to implement IEqualityComparer<T> ? It's easy enough to write one (if your ignore problems with defining a correct hashcode), but I'd like to know...
How to convert currentTimeMillis to a date in Java?
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edited Apr 29 '15 at 17:32
nbro
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Removing all non-numeric characters from string in Python
...icient way, but:
>>> ''.join(c for c in "abc123def456" if c.isdigit())
'123456'
The ''.join part means to combine all the resulting characters together without any characters in between. Then the rest of it is a list comprehension, where (as you can probably guess) we only take the part...
How to drop unique in MySQL?
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edited Dec 3 '12 at 7:08
answered Oct 14 '09 at 8:12
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Python Image Library fails with message “decoder JPEG not available” - PIL
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libjpeg-dev is required to be able to process jpegs with pillow (or PIL), so you need to install it and then recompile pillow. It also seems that libjpeg8-dev is needed on Ubuntu 14.04
If you're still using PIL then you should really be using pillow these days though, so first...
Do I need dependency injection in NodeJS, or how to deal with …?
I currently creating some experimental projects with nodejs. I have programmed a lot Java EE web applications with Spring and appreciated the ease of dependency injection there.
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How to pass arguments to a Button command in Tkinter?
Suppose I have the following Button made with Tkinter in Python:
18 Answers
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Installation Issue with matplotlib Python [duplicate]
...end is not the default. Set the back end of macosx that is differ compare with other windows or linux os.
Solution
I assume you have installed the pip matplotlib, there is a directory in your root called ~/.matplotlib.
Create a file ~/.matplotlib/matplotlibrc there and add the following code: b...
php 遍历目录批量转换文件编码 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的文件编码转换为UTF-8，代码如下：< ?php php iconv.php exec it on root dir$path = dirname(__F...遍历当前目录及子目录。把所有的文件编码转换为UTF-8，代码如下：
< ?php
//php iconv.php
//exec it on root dir
$path = dirname(__FILE__);
tree($path);
fun...
How can you dynamically create variables via a while loop? [duplicate]
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edited Feb 18 '11 at 2:37
answered Feb 18 '11 at 1:28
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