大约有 40,000 项符合查询结果（耗时：0.0570秒） [XML]
Split output of command by columns using Bash?
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I think the simplest way is to use awk. Example:
$ echo "11383 pts/1 00:00:00 bash" | awk '{ print $4; }'
bash
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How can I add an ampersand for a value in a ASP.net/C# app config file value
...link isn't displaying any article at the moment.
– Gk_999
Aug 31 at 6:30
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Unlimited Bash History [closed]
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(export PROMPT_COMMAND='history -a') can flush commands to bash history immediately.
– cruelcage
Sep 11 '14 at 13:49
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Python: json.loads returns items prefixing with 'u'
...(for now) like the code below. My output comes out with character 'u' prefixing each item:
9 Answers
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pandas: multiple conditions while indexing data frame - unexpected behavior
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You can use query(), i.e.:
df_filtered = df.query('a == 4 & b != 2')
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Lightweight XML Viewer that can handle large files [closed]
There are plenty of "heavyweight" tools such as XmlSpy, which are good for prodding around in xml docs - but often (very often in some cases!) you just want to quickly open and browse an xml doc, and have it pretty printed. Possibly with some basic search functionality (textual is probably fine).
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Correctly determine if date string is a valid date in that format
...eger with any number of digits so changing the comparison from == to === fixes the issue.
return $d && $d->format($format) === $date;
}
[Function taken from this answer. Also on php.net. Originally written by Glavić.]
Test cases:
var_dump(validateDate('2013-13-01')); // false
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Alternative to iFrames with HTML5
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<iframe> An iframe's content lives entirely in a separate context than your page. While that's mostly a great feature and it's the most compatible among browser versions, it creates additional challenges (shrink wrapping the size of the frame to its content is tough, insanely frustrating...
Selecting last element in JavaScript array [duplicate]
... answer! It can be used in a one-liner (my_array could be replaced by an expression or function that returns an array) and you don't have to make a global change to the Array prototype.
– Jim Pivarski
Apr 25 '14 at 21:25
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Repeat each row of data.frame the number of times specified in a column
What is the simplest way to expand each row the first two columns of the data.frame above, so that each row is repeated the number of times specified in the column 'freq'?
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