大约有 48,000 项符合查询结果（耗时：0.0564秒） [XML]
How do I use Linq to obtain a unique list of properties from a list of objects?
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323
IEnumerable<int> ids = list.Select(x=>x.ID).Distinct();
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How do I find all files containing specific text on Linux?
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edited Jul 1 at 2:18
d3v_1
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answered Jun 6 '13 at 8:21
rakib_ra...
How do I detach objects in Entity Framework Code First?
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saluce
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answered Apr 8 '11 at 20:00
Ladislav MrnkaLadislav...
How can I find out the total physical memory (RAM) of my linux box suitable to be parsed by a shell
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13 Answers
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How to create a GUID/UUID in Python
...rce]
Docs:
Python 2: http://docs.python.org/2/library/uuid.html
Python 3:
https://docs.python.org/3/library/uuid.html
Example (working on 2 and 3):
>>> import uuid
>>> uuid.uuid4()
UUID('bd65600d-8669-4903-8a14-af88203add38')
>>> str(uuid.uuid4())
'f50ec0b7-f960-400...
How can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
...rson Person II
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answered Jul 2 '10 at 16:02
Phil MillerPhil Miller
30.4k111...
Detect if a NumPy array contains at least one non-numeric value?
...ing and will work regardless of shape.
numpy.isnan(myarray).any()
Edit: 30x faster:
import timeit
s = 'import numpy;a = numpy.arange(10000.).reshape((100,100));a[10,10]=numpy.nan'
ms = [
'numpy.isnan(a).any()',
'any(numpy.isnan(x) for x in a.flatten())']
for m in ms:
print " %.2f s"...
Where are shared preferences stored?
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243
SharedPreferences are stored in an xml file in the app data folder, i.e.
/data/data/YOUR_PACKAG...
Lowercase JSON key names with JSON Marshal in Go
..._b,omitempty"`
}
This will generate JSON as follows:
{
"field_a": 1234,
"field_b": "foobar"
}
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