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Add 2 hours to current time in MySQL?
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SELECT *
FROM courses
WHERE DATE_ADD(NOW(), INTERVAL 2 HOUR) > start_time
See Date and Time Functions for other date/time manipulation.
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深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...间接取得中断服务例程入口。
在 x86/x64 体系中允许有 256 个中断存在，中断号从 0x00 - 0xff，共 256 个中断，如图：
上面这个图是实模式下的 IVT 表，每个向量占据 4 个字节，中断服务例程入口是以 segment:offset 形式提供的，off...
Why use make over a shell script?
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132
The general idea is that make supports (reasonably) minimal rebuilds -- i.e., you tell it what p...
Can't install PIL after Mac OS X 10.9
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28 Answers
28
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Rearrange columns using cut
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152
For the cut(1) man page:
Use one, and only one of -b, -c or -f. Each LIST is made up of ...
python assert with and without parenthesis
...s optional, you've essentially called assert True when you wrote assert(1==2, "hi").
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Combine two data frames by rows (rbind) when they have different sets of columns
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234
rbind.fill from the package plyr might be what you are looking for.
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Can I force a page break in HTML printing?
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edited Jun 5 at 21:00
JM0
966 bronze badges
answered Nov 2 '09 at 22:12
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typeof for RegExp
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edited Nov 27 '18 at 6:34
Alexis Wilke
14.2k77 gold badges5151 silver badges9898 bronze badges
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