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LINQ with groupby and count
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412
After calling GroupBy, you get a series of groups IEnumerable<Grouping>, where each Groupi...
What is Scala's yield?
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It is used in sequence comprehensions (like Python's list-comprehensions and generators, where...
cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
...86家族CPU都有这个指令我也不是很清楚，但在EFLAGS中的bit 21可以识别CPU是否支持CPUID指令，如下图：
图1
在8086和8088CPU中，FLAGS只有16位长，在80386CPU中，bit 21被保留未用，在支持CPUID指令的CPU中，这一位将为1。
2、CP...
setup.py examples?
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edited Jul 24 '16 at 9:22
sudip
15399 bronze badges
answered Jan 19 '11 at 20:54
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Get the first item from an iterable that matches a condition
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In Python 2.6 or newer:
If you want StopIteration to be raised if no matching element is found:
next(x for x in the_iterable if x > 3)
If you want default_value (e.g. None) to be returned instead:
next((x for x in the_iterable ...
Difference between signed / unsigned char [duplicate]
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answered Dec 2 '10 at 16:25
AnTAnT
283k3838 gold badges470470 silver badges714714 bronze badges
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Is there “0b” or something similar to represent a binary number in Javascript
...xadecimal numbers in Javascript. For example, 0xFF stands for the number 255.
10 Answers
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Python multiprocessing pool.map for multiple arguments
...as pool:
results = pool.starmap(merge_names, product(names, repeat=2))
print(results)
# Output: ['Brown & Brown', 'Brown & Wilson', 'Brown & Bartlett', ...
For earlier versions of Python, you'll need to write a helper function to unpack the arguments explicitly. If you wan...
Trying to SSH into an Amazon Ec2 instance - permission error
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29 Answers
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