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Why does multiprocessing use only a single core after I import numpy?
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A workaround is to reset the task affinity using
os.system("taskset -p 0xff %d" % os.getpid())
With this line pasted in after the module imports, my example now runs on all cores:
My experience so far has been that this doesn't seem to have any negative effect on numpy's performance, althoug...
Make a Bash alias that takes a parameter?
...ot accept parameters but a function can be called just like an alias. For example:
myfunction() {
#do things with parameters like $1 such as
mv "$1" "$1.bak"
cp "$2" "$1"
}
myfunction old.conf new.conf #calls `myfunction`
By the way, Bash functions defined in your .bashrc and other ...
Nested rows with bootstrap grid system?
I want 1 larger image with 4 smaller images in a 2x2 format like this:
2 Answers
2
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cannot convert data (type interface {}) to type string: need type assertion
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According to the Go specification:
For an expression x of interface type and a type T, the primary expression x.(T) asserts that x is not nil and that the value stored in x is of type T.
A "type assertion" allows you to declare an interface value contains a certain ...
Remove the bottom divider of an android ListView
I have a fixed height ListView . It has divider between list items, but it also displays dividers after the last list item.
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Embedding Base64 Images
...supported by the following web browsers:
Gecko-based, such as Firefox, SeaMonkey, XeroBank, Camino, Fennec and K-Meleon
Konqueror, via KDE's KIO slaves input/output system
Opera (including devices such as the Nintendo DSi or Wii)
WebKit-based, such as Safari (including on iOS), Android'...
How can I check if a key is pressed during the click event with jQuery?
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You can even detect Mac OS X's command key using if (e.metaKey) alert('Command down'). Here's a nice article about key events in JS unixpapa.com/js/key.html
– F Lekschas
Nov 2 '15 at 23:39
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Objective-C formatting string for boolean?
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I love cake and no cake! I am going to replace all my x?@"YES":@"NO" code with x?@"Cake":@"No Cake" immediately :D -- well, at least for my object descriptions anyway ;)
– Jason Coco
Apr 8 '10 at 23:26
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How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...turned value (which is also legal but not required). In practice, I would expect any C++ compiler to be able to optimize that such that it's as fast as direct initialization.
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Unmangling the result of std::type_info::name
...ef __GNUG__
#include <cstdlib>
#include <memory>
#include <cxxabi.h>
std::string demangle(const char* name) {
int status = -4; // some arbitrary value to eliminate the compiler warning
// enable c++11 by passing the flag -std=c++11 to g++
std::unique_ptr<char, voi...