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Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
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edited Dec 4 '13 at 9:55
answered Feb 28 '12 at 18:31
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Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?
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edited Jun 9 '13 at 13:48
answered Jun 9 '13 at 13:24
SL...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
... Jaap
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answered Feb 19 '11 at 3:50
Greg SnowGreg Snow
44.2k44 gold...
python max function using 'key' and lambda expression
... Applying max to a list of tuples.
>>> lis = [(1,'a'), (3,'c'), (4,'e'), (-1,'z')]
By default max will compare the items by the first index. If the first index is the same then it'll compare the second index. As in my example, all items have a unique first index, so you'd get this as the...
CGRidCtrl控件 学习心得 - C/C++ - 清泛网 - 专注C/C++及内核技术
...能介绍... 1
2.2 框架介绍... 2
2.3 主要类介绍... 4
2.3.1 CGridCtrl类... 4
2.3.2 CGridCellCheck类... 5
2.3.3 CGridCellCombo类... 7
2.4 控件类CGridCtrl常用函数说明... 10
2.4.1 行和列的设置... 10
2.4.2 单元格信息设置.....
Apply multiple functions to multiple groupby columns
... similar dataframe as the one from above
df = pd.DataFrame(np.random.rand(4,4), columns=list('abcd'))
df['group'] = [0, 0, 1, 1]
df
a b c d group
0 0.418500 0.030955 0.874869 0.145641 0
1 0.446069 0.901153 0.095052 0.487040 0
2 0.843026 0.9361...
What is “vectorization”?
...ead of processing a single element of an array N times, it processes (say) 4 elements of the array simultaneously N/4 times.
(I chose 4 because it's what modern hardware is most likely to directly support; the term "vectorization" is also used to describe a higher level software transformation wher...
Fatal error in launcher: Unable to create process using “”C:\Program Files (x86)\Python33\python.exe
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457
it seems that
python -m pip install XXX
will work anyway (worked for me)
(see link by user...
What is the exact problem with multiple inheritance?
...pe of object. Something like this:
class A:
at offset 0 ... "abc" ... 4 byte int field
at offset 4 ... "xyz" ... 8 byte double field
at offset 12 ... "speak" ... 4 byte function pointer
class B:
at offset 0 ... "foo" ... 2 byte short field
at offset 2 ... 2 bytes of alignment p...