大约有 43,000 项符合查询结果（耗时：0.1198秒） [XML]
Validate uniqueness of multiple columns
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3 Answers
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Creating my own Iterators
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Chinasaur
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answered Sep 29 '08 at 15:34
RoelRoel
17.8...
Possibility of duplicate Mongo ObjectId's being generated in two different collections?
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323
Short Answer
Just to add a direct response to your initial question: YES, if you use BSON Obj...
Could not load file or assembly 'Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=3
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edited May 19 '16 at 12:31
s_a
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answered Apr 30 '14 at 7:00
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What is the difference between “text” and new String(“text”)?
...his is very peculiar, and is rarely the intention.
References
JLS 15.21.3 Reference Equality Operators == and !=
class Object - boolean Object(equals)
Related issues
Java String.equals versus ==
How do I compare strings in Java?
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Given an RGB value, how do I create a tint (or shade)?
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Differences between numpy.random and random.random in Python
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Fastest way to reset every value of std::vector to 0
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353
std::fill(v.begin(), v.end(), 0);
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An efficient way to transpose a file in Bash
...,j];
}
print str
}
}' file
output
$ more file
0 1 2
3 4 5
6 7 8
9 10 11
$ ./shell.sh
0 3 6 9
1 4 7 10
2 5 8 11
Performance against Perl solution by Jonathan on a 10000 lines file
$ head -5 file
1 0 1 2
2 3 4 5
3 6 7 8
4 9 10 11
1 0 1 2
$ wc -l < file
10000
$ time per...