大约有 20,000 项符合查询结果（耗时：0.0293秒） [XML]
How do I find the duplicates in a list and create another list with them?
... [1, 2, 5]
Just in case speed matters, here are some timings:
# file: test.py
import collections
def thg435(l):
return [x for x, y in collections.Counter(l).items() if y > 1]
def moooeeeep(l):
seen = set()
seen_add = seen.add
# adds all elements it doesn't know yet to seen ...
Java: Subpackage visibility?
I have two packages in my project: odp.proj and odp.proj.test . There are certain methods that I want to be visible only to the classes in these two packages. How can I do this?
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How to print instances of a class using print()?
...
>>> class Test:
... def __repr__(self):
... return "Test()"
... def __str__(self):
... return "member of Test"
...
>>> t = Test()
>>> t
Test()
>>> print(t)
member of Test
The __str_...
Fastest way to reset every value of std::vector to 0
What's the fastest way to reset every value of a std::vector<int> to 0 and keeping the vectors initial size ?
6 An...
Get file name from URI string in C#
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Also beware of a querystring. http://www.test.com/file1.txt?a=b will result in file1.txt?a=b
– Julian
Mar 10 '15 at 12:44
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How to split data into training/testing sets using sample function
...e(seq_len(nrow(mtcars)), size = smp_size)
train <- mtcars[train_ind, ]
test <- mtcars[-train_ind, ]
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Cartesian product of x and y array points into single array of 2D points
... are faster than others, and some are more general-purpose. After a lot of testing and tweaking, I've found that the following function, which calculates an n-dimensional cartesian_product, is faster than most others for many inputs. For a pair of approaches that are slightly more complex, but are e...
How to write to Console.Out during execution of an MSTest test
...appearing is because the backend code is not running in the context of the test.
You're probably better off using Trace.WriteLine (In System.Diagnostics) and then adding a trace listener which writes to a file.
This topic from MSDN shows a way of doing this.
According to Marty Neal's and Dave A...
The point of test %eax %eax [duplicate]
...ly, it sets the zero flag if the difference is zero (operands are equal).
TEST sets the zero flag, ZF, when the result of the AND operation is zero. If two operands are equal, their bitwise AND is zero when both are zero. TEST also sets the sign flag, SF, when the most significant bit is set in the...
Local (?) variable referenced before assignment [duplicate]
...
In order for you to modify test1 while inside a function you will need to do define test1 as a global variable, for example:
test1 = 0
def testFunc():
global test1
test1 += 1
testFunc()
However, if you only need to read the global variable ...