大约有 44,000 项符合查询结果（耗时：0.0833秒） [XML]
RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
...use positive look ahead to see if at least one non-word character exists
And I agree with SilentGhost, \W might be a bit broad. I'd replace it with a character set like this: [-+_!@#$%^&*.,?] (feel free to add more of course!)
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Using Vim's persistent undo?
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Put this in your .vimrc to create an undodir if it doesn't exist and enable persistent undo. Tested on both Windows and Linux.
" Put plugins and dictionaries in this dir (also on Windows)
let vimDir = '$HOME/.vim'
let &runtimepath.=','.vimDir
" Keep undo history across sessions by st...
Wget output document and headers to STDOUT
I'm trying to output document body and its headers to stdout with wget by wget -S -O - http://google.com
5 Answers
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How to create duplicate allowed attributes
... AttributeUsage attribute onto your Attribute class (yep, that's mouthful) and set AllowMultiple to true:
[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
public sealed class MyCustomAttribute: Attribute
sha...
When NOT to use Cassandra?
There has been a lot of talk related to Cassandra lately.
18 Answers
18
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unable to install pg gem
... me:
Install the postgresql-devel package, this will solve the issue of pg_config missing.
sudo apt-get install libpq-dev
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Why doesn't C have unsigned floats?
...If C++ did support it, then you would be sometimes using an unsigned float and not realizing that your performance has just been killed. If C++ supported it then every floating point operation would need to be checked to see if it is signed or not. And for programs that do millions of floating poi...
How do I drop table variables in SQL-Server? Should I even do this?
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Table variables are automatically local and automatically dropped -- you don't have to worry about it.
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mysql check collation of a table
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You can also query INFORMATION_SCHEMA.TABLES and get the collation for a specific table:
SELECT TABLE_SCHEMA
, TABLE_NAME
, TABLE_COLLATION
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME = 't_name';
that gives a much more readable output in contrast to SHO...
Clear form field after select for jQuery UI Autocomplete
I'm developing a form, and using jQuery UI Autocomplete. When the user selects an option, I want the selection to pop into a span appended to the parent <p> tag. Then I want the field to clear rather than be populated with the selection.
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