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Add 2 hours to current time in MySQL?
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edited Aug 20 '13 at 7:23
answered Feb 26 '09 at 8:41
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jQuery / Javascript - How do I convert a pixel value (20px) to a number value (20)
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No jQuery required for this, Plain Ol' JS (tm) will do ya,
parseInt(a, 10);
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SQLite Reset Primary Key Field
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answered Oct 21 '09 at 16:03
Nick DandoulakisNick Dandoulakis
39.7k1414 gold badges9494 silver badges135135 bronze badges
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App Inventor 2 列表代码块 · App Inventor 2 中文网
...在列表中的位置，从 1 开始，如果不在列表中，则返回 0。
选择列表中索引值对应的列表项
返回给定列表中给定索引处的项目，索引从 1 开始。
在列表的某个位置插入列表项
将项目插入...
matplotlib Legend Markers Only Once
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K.-Michael Aye
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answered May 27 '11 at 1:22
DSMDSM
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How can I wait for set of asynchronous callback functions?
... specific with your code, so I'll make up a scenario. Let's say you have 10 ajax calls and you want to accumulate the results from those 10 ajax calls and then when they have all completed you want to do something. You can do it like this by accumulating the data in an array and keeping track of w...
How do I query using fields inside the new PostgreSQL JSON datatype?
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180
Postgres 9.2
I quote Andrew Dunstan on the pgsql-hackers list:
At some stage there will pos...
SVG Positioning
...just put the transformation in the g element:
<g transform="translate(20,2.5) rotate(10)">
<rect x="0" y="0" width="60" height="10"/>
</g>
Links: Example from the SVG 1.1 spec
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解决：error while loading shared libraries: libpcre.so.1: cannot open ...
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[root@info lib]# ldd /usr/local/apache2/bin/httpd
libaprutil-0.so.0 => /usr/local/apache2/lib/libaprutil-0.so.0 (0x00242000)
libexpat.so.0 => /usr/lib/libexpat.so.0 (0x00554000)
libapr-0.so.0 => /usr/local/apache2/lib/libapr-0.so.0 (0x007e2000)
librt.so.1 ...
Simple way to calculate median with MySQL
...um+1 as `row_number`, @total_rows:=@rownum
FROM data d, (SELECT @rownum:=0) r
WHERE d.val is NOT NULL
-- put some where clause here
ORDER BY d.val
) as dd
WHERE dd.row_number IN ( FLOOR((@total_rows+1)/2), FLOOR((@total_rows+2)/2) );
Steve Cohen points out, that after the first pass, @rown...