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Best way to store date/time in mongodb
... example.
If you need to, you can easily convert Date objects to and from Unix timestamps1), using the getTime() method and Date(milliseconds) constructor, respectively.
1) Strictly speaking, the Unix timestamp is measured in seconds. The JavaScript Date object measures in milliseconds since the U...
Windows equivalent of the 'tail' command
...output everything after the first 2 lines.
This is actually the inverse of Unix head:
Unix console:
root@server:~$ head -2 myfile.txt
The above command will print only the first 2 lines of the file.
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How to calculate time difference in java?
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Just like any other language; convert your time periods to a unix timestamp (ie, seconds since the Unix epoch) and then simply subtract.
Then, the resulting seconds should be used as a new unix timestamp and read formatted in whatever format you want.
Ah, give the above poster (genesi...
CSV new-line character seen in unquoted field error
...e CSV (Macintosh) as save-as type.
My preferred EOL version would be LF (Unix/Linux/Apple), but I don't think MS Office provides the option to save in this format.
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Kill process by name?
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Assuming you're on a Unix-like platform (so that ps -A exists),
>>> import subprocess, signal
>>> import os
>>> p = subprocess.Popen(['ps', '-A'], stdout=subprocess.PIPE)
>>> out, err = p.communicate()
gives...
Match linebreaks - \n or \r\n?
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@AsadSaeeduddin No it can't. It won't match the Unix line-ending \n
– Peter van der Wal
Jun 8 '16 at 17:42
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Why use bzero over memset?
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I'm guessing you used (or your teacher was influenced by) UNIX Network Programming by W. Richard Stevens. He uses bzero frequently instead of memset, even in the most up-to-date edition. The book is so popular, I think it's become an idiom in network programming which is why you s...
How to get start and end of day in Javascript?
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add .unix() at the end to get unix timestamp in seconds :) like this: moment().startOf('day').unix()
– Lukas Liesis
Jul 13 '17 at 18:58
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App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...不如直接第二种方式）。
综上所述：
1、小朋友编程的话，有条件建议直接使用安卓手机扫二维码测试；否则使用最新版的AIStarter模拟器也可以。
2、对于没有安卓手机的或需要一屏展示效果的，建议第二种：使用商业...
What are file descriptors, explained in simple terms?
...make your life easier. In C, stdin, stdout, and stderr are FILE*, which in UNIX respectively map to file descriptors 0, 1 and 2.
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