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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...
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...
Checking a Python module version at runtime
...
jldupont
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answered Apr 2 '09 at 17:02
Mark RoddyMark R...
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 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...
What are the rules about using an underscore in a C++ identifier?
...d template specializations, though.)
From the 2003 C++ Standard:
17.4.3.1.2 Global names [lib.global.names]
Certain sets of names and function signatures are always reserved to the implementation:
Each name that contains a double underscore (__) or begins with an underscore follo...
Ignoring accented letters in string comparison
...
254
EDIT 2012-01-20: Oh boy! The solution was so much simpler and has been in the framework nearly f...
Sequence-zip function for c++11?
...it may crash or iterate beyond the end).
Starting from Boost 1.56.0 (2014 Aug 7) you could use boost::combine (the function exists in earlier versions but undocumented):
#include <boost/range/combine.hpp>
#include <vector>
#include <list>
#include <string>
int main() {
...
What does it mean to inflate a view from an xml file?
...R.layout.your_layout, null); // 2 and 3
setContentView(theInflatedView) // 4
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[源码实例] c/c++获取网卡mac地址 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
// 把网卡MAC地址格式化成常用的16进制形式，如0010-A4E4-5802
sprintf(pMicID,"%02x-%02x-%02x-%02x-%02x-%02x",
Adapter.adapt.adapter_address[0],
Adapter.adapt.adapter_address[1],
Adapter.adapt.adapter_address[2],
Adapter.adapt.adapter_address[3],
Adapte...