大约有 43,000 项符合查询结果（耗时：0.0318秒） [XML]
Regex to validate date format dd/mm/yyyy
...post.
I modified it to take dd/mm/yyyy, dd-mm-yyyy or dd.mm.yyyy.
^(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[13-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$...
Why does direction of index matter in MongoDB?
...
114
MongoDB concatenates the compound key in some way and uses it as the key in a BTree.
When fin...
How can I use “:” as an AWK field separator?
...
"-F" is a command line argument, not AWK syntax. Try:
echo "1: " | awk -F ":" '/1/ {print $1}'
share
|
improve this answer
|
follow
|
...
SQL Logic Operator Precedence: And and Or
...
And has precedence over Or, so, even if a <=> a1 Or a2
Where a And b
is not the same as
Where a1 Or a2 And b,
because that would be Executed as
Where a1 Or (a2 And b)
and what you want, to make them the same, is the following (using parentheses to override rule...
how to draw smooth curve through N points using javascript HTML5 canvas?
...
11 Answers
11
Active
...
Error to install Nokogiri on OSX 10.9 Maverick?
...
You can also install Nokogiri on Mac OS X 10.9 Mavericks with full XCode Install using:
gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2
Update
For t...
Floating point vs integer calculations on modern hardware
...
11 Answers
11
Active
...
Find the most frequent number in a numpy vector
...
12 Answers
12
Active
...
Regular expression to match numbers with or without commas and decimals in text
...
10 Answers
10
Active
...
Best way to test if a row exists in a MySQL table
...
12 Answers
12
Active
...