大约有 26,000 项符合查询结果（耗时：0.0406秒） [XML]
grep a file, but show several surrounding lines?
...nd -A num for the number of lines after the match.
grep -B 3 -A 2 foo README.txt
If you want the same number of lines before and after you can use -C num.
grep -C 3 foo README.txt
This will show 3 lines before and 3 lines after.
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Random date in C#
I'm looking for some succinct, modern C# code to generate a random date between Jan 1 1995 and the current date.
7 Answers
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What does ':' (colon) do in JavaScript?
...
var o = {
r: 'some value',
t: 'some other value'
};
is functionally equivalent to
var o = new Object();
o.r = 'some value';
o.t = 'some other value';
share
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Generate a random alphanumeric string in Cocoa
I want to call a method, pass it the length and have it generate a random alphanumeric string.
20 Answers
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Find all files in a directory with extension .txt in Python
...ow would you create a file or list with that info?
– Merlin
Oct 19 '10 at 3:48
74
@ghostdog74: In...
Multiline TextView in Android?
...axLines="4"
android:lines="4"
android:text="Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat."></TextVi...
Let JSON object accept bytes or let urlopen output strings
With Python 3 I am requesting a json document from a URL.
12 Answers
12
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What does it mean by select 1 from table?
I have seen many queries with something as follows.
15 Answers
15
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How can I rename a field for all documents in MongoDB?
...suming I have a collection in MongoDB with 5000 records, each containing something similar to:
7 Answers
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Socket File “/var/pgsql_socket/.s.PGSQL.5432” Missing In Mountain Lion (OS X Server)
...er from Lion Server to Mountain Lion using OS X Server. I am having the same problem with PostgreSQL that I did last year when I first installed Lion Server.
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