大约有 40,000 项符合查询结果（耗时：0.0380秒） [XML]
SQL set values of one column equal to values of another column in the same table
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
How does lucene index documents?
...airly good article here: https://web.archive.org/web/20130904073403/http://www.ibm.com/developerworks/library/wa-lucene/
Edit 12/2014: Updated to an archived version due to the original being deleted, probably the best more recent alternative is http://lucene.apache.org/core/3_6_2/fileformats.html
...
How do I install a NuGet package into the second project in a solution?
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
How can I detect the encoding/codepage of a text file
...ked very well for me, especially for processing uploaded CSV data:
http://www.architectshack.com/TextFileEncodingDetector.ashx
Advantages:
BOM detection built-in
Default/fallback encoding customizable
pretty reliable (in my experience) for western-european-based files containing some exotic data...
In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
...e: ‘1000-01-01 00:00:00′ to
‘9999-12-31 23:59:59′
source: https://www.dbrnd.com/2015/09/difference-between-datetime-and-timestamp-in-mysql/#:~:text=DATETIME%20vs%20TIMESTAMP%3A,DATETIME%20is%20constant.
Also...
table with different column "date" types and corresponding rails migration types...
Catching multiple exception types in one catch block
...s
}
catch(Exception $e)
{
// Handle the general case
}
Docs: https://www.php.net/manual/en/language.exceptions.php#example-287
RFC: https://wiki.php.net/rfc/multiple-catch
Commit: https://github.com/php/php-src/commit/0aed2cc2a440e7be17552cc669d71fdd24d1204a
For PHP before 7.1:
Despite w...
Passing an Array as Arguments, not an Array, in PHP
...
http://www.php.net/manual/en/function.call-user-func-array.php
call_user_func_array('func',$myArgs);
share
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improve this answer...
How can I measure the similarity between two images? [closed]
...ame differences.
Look at this open source image search application http://www.semanticmetadata.net/lire/. It describes several image similarity algorighms, three of which are from the MPEG-7 standard: ScalableColor, ColorLayout, EdgeHistogram and Auto Color Correlogram.
...
How to check if a specific key is present in a hash or not?
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
Full examples of using pySerial package [closed]
...
http://web.archive.org/web/20131107050923/http://www.roman10.net/serial-port-communication-in-python/comment-page-1/
#!/usr/bin/python
import serial, time
#initialization and open the port
#possible timeout values:
# 1. None: wait forever, block call
# 2. 0: non-bl...