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MySQL string replace
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UPDATE your_table
SET your_field = REPLACE(your_field, 'articles/updates/', 'articles/news/')
WHERE your_field LIKE '%articles/updates/%'
Now rows that were like
http://www.example.com/articles/updates/43
will be
http://www.example...
.NET / C# - Convert char[] to string
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Joel CoehoornJoel Coehoorn
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What does “opt” mean (as in the “opt” directory)? Is it an abbreviation? [closed]
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In the old days, "/opt" was used by UNIX vendors like AT&T, Sun, DEC and 3rd-party vendors to hold "Option" packages; i.e. packages that you might have paid extra money for. I don't recall seeing "/opt" on Berkeley BSD UNIX. They used "/usr/local" for ...
jQuery same click event for multiple elements
...dd('.class2').on('click', some_function);
This also works with existing objects:
const $class1 = $('.class1');
const $class2 = $('.class2');
$class1.add($class2).on('click', some_function);
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Is there a short cut for going back to the beginning of a file by vi editor?
When reading a long file by vi editor, it would be very nice to get back to the beginning of the file by some short cuts when you really need to do so. Even ctrl + B sometimes is too slow. Does anyone know such a tool?
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Benchmarking (python vs. c++ using BLAS) and (numpy)
I would like to write a program that makes extensive use of BLAS and LAPACK linear algebra functionalities. Since performance is an issue I did some benchmarking and would like know, if the approach I took is legitimate.
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SQL to find the number of distinct values in a column
...gregate function:
SELECT COUNT(DISTINCT column_name) AS some_alias FROM table_name
This will count only the distinct values for that column.
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Best way to assert for numpy.array equality?
...__eq__ returns a new array (so TestCase.assertEqual fails), what is the best way to assert for equality?
6 Answers
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数据结构、算法复杂度一览表 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...omplexities常用算法、数据结构复杂度一览表。来源：http://bigocheatsheet.com/
搜索算法(来源)
算法
数据结构
时间复杂度
空间复杂度
平均
最差
最差
深度优先搜索
图G(V,E), V为顶...
Questions every good .NET developer should be able to answer? [closed]
My company is about to hire .NET developers . We work on a variety of .NET platforms: ASP.NET, Compact Framework, Windowsforms, Web Services. I'd like to compile a list/catalog of good questions, a kind of minimum standard to see if the applicants are experienced. So, my question is:
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