Jest spy on functionality
There is the spyOn method, that was introduced with v19 some days ago, that does exactly what you are looking for
what does +=, -=, *= and /= stand for in Python?
what does +=, -=, *= and /= stand for in Python? and how do you use it for while loop?
Converting list to numpy array
If you have a list of lists, you only needed to use … per this LINK in the scipy / numpy documentation. You just needed to define dtype inside the call to asarray.
Creating multiline strings in JavaScript
Update: ECMAScript 6 (ES6) introduces a new type of literal, namely template literals. They have many features, variable interpolation among others, but most importantly for this question, they can be multiline. A template literal is delimited by backticks: (Note: I’m not advocating to use HTML in strings) Browser support is OK, but you can use transpilers to be more … Read more
numpy matrix vector multiplication
Simplest solution Use numpy.dot or a.dot(b). See the documentation here. This occurs because numpy arrays are not matrices, and the standard operations *, +, -, / work element-wise on arrays. Note that while you can use numpy.matrix (as of early 2021) where * will be treated like standard matrix multiplication, numpy.matrix is deprecated and may … Read more
Hide scroll bar, but while still being able to scroll
Just a test which is working fine. Working Fiddle JavaScript: Since the scrollbar width differs in different browsers, it is better to handle it with JavaScript. If you do Element.offsetWidth – Element.clientWidth, the exact scrollbar width will show up. JavaScript Working Fiddle Or Using Position: absolute, Working Fiddle JavaScript Working Fiddle Information: Based on this … Read more
Undefined reference to pthread_create
Use -lpthread as the last compiler flag. example: gcc -o sample sample.c -lpthread
WinError 2 The system cannot find the file specified (Python)
Popen expect a list of strings for non-shell calls and a string for shell calls. Call subprocess.Popen with shell=True: Hopefully this solves your issue. This issue is listed here: https://bugs.python.org/issue17023
Error in linux console : Couldn’t get a file descriptor referring to the console
setfont modifies the font in the VGA console (what you get when you press CTRL-ALT-F1, etc) It won’t do anything in Terminal. Normally only the root user can access the console device that setfont needs to connect to in order to make the font change. This is why you get an error message when you … Read more