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Converting NumPy array into Python List structure?
...his converts the values from whatever numpy type they may have (e.g. np.int32 or np.float32) to the "nearest compatible Python type" (in a list). If you want to preserve the numpy data types, you could call list() on your array instead, and you'll end up with a list of numpy scalars. (Thanks to Mr_a...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...ich should probably be a size_t anyway...) to be better, as using uint_fast32_t causes gcc to use a 64-bit uint.
I did a bit of mucking around with the assembly:
Simply take the 32-bit version, replace all 32-bit instructions/registers with the 64-bit version in the inner popcount-loop of the progra...
iPhone Data Usage Tracking/Monitoring
...)
{
struct ifaddrs *addrs;
const struct ifaddrs *cursor;
u_int32_t WiFiSent = 0;
u_int32_t WiFiReceived = 0;
u_int32_t WWANSent = 0;
u_int32_t WWANReceived = 0;
if (getifaddrs(&addrs) == 0)
{
cursor = addrs;
while (cursor != NULL)
{
...
Best implementation for hashCode method for a collection
...late (int)f;
If the field f is a long: calculate (int)(f ^ (f >>> 32));
If the field f is a float: calculate Float.floatToIntBits(f);
If the field f is a double: calculate Double.doubleToLongBits(f) and handle the return value like every long value;
If the field f is an object: Use the resu...
如何查看Android应用.apk是32位还是64位？ - App应用开发 - 清泛IT社区，为创新赋能！
...的架构。例如，arm64-v8a表示64位ARM架构，而armeabi-v7a表示32位ARM架构。
3）使用命令行工具：如果你喜欢使用命令行，可以使用如aapt这类工具来查看APK文件的信息，包括其支持的架构。
aapt dump badging your_app.apk | grep native-code
...
Suppress Scientific Notation in Numpy When Creating Array From Nested List
... Free Url
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answered Jun 1 '12 at 16:46
wiswitwiswit
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Converting a double to an int in C#
...
Because Convert.ToInt32 rounds:
Return Value: rounded to the nearest 32-bit signed integer. If value
is halfway between two whole numbers, the even number is returned;
that is, 4.5 is converted to 4, and 5.5 is converted to 6.
...while ...
What integer hash function are good that accepts an integer hash key?
...
Knuth's multiplicative method:
hash(i)=i*2654435761 mod 2^32
In general, you should pick a multiplier that is in the order of your hash size (2^32 in the example) and has no common factors with it. This way the hash function covers all your hash space uniformly.
Edit: The biggest...
List comprehension rebinds names even after scope of comprehension. Is this right?
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– Steven Rumbalski
Nov 10 '11 at 20:32
38
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NSLog/printf specifier for NSInteger?
A NSInteger is 32 bits on 32-bit platforms, and 64 bits on 64-bit platforms. Is there a NSLog specifier that always matches the size of NSInteger ?
...