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Assigning a variable NaN in python without numpy
...o similar checks with complex numbers, the cmath module contains a similar set of functions and constants as the math module:
cmath.isnan(...)
cmath.isinf(...)
cmath.isfinite(...) (Python 3.2+)
cmath.nan (Python 3.6+; equivalent to complex(float('nan'), 0.0))
cmath.nanj (Python 3.6+; equivalent to...
Difference between wait() and sleep()
What is the difference between a wait() and sleep() in Threads?
33 Answers
33
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Apply .gitignore on an existing repository already tracking large number of files
...untrack” any files that are would otherwise be ignored under the current set of exclude patterns:
(GIT_INDEX_FILE=some-non-existent-file \
git ls-files --exclude-standard --others --directory --ignored -z) |
xargs -0 git rm --cached -r --ignore-unmatch --
This leaves the files in your working d...
Is it possible to reopen a closed branch in Mercurial?
...d.To get this to work I had to update to the branch before the close changeset (effectively the parent) and then update to the close changeset. Odd thing is, when you update to the parent, TortoiseHg claims the close changeset (the descendant) is the parent. Whatever, it works just fine once you jum...
How to convert R Markdown to PDF?
... copy of pandoc through RStudio, I can use the following:
Rscript -e "Sys.setenv(RSTUDIO_PANDOC='/Applications/RStudio.app/Contents/MacOS/pandoc');library(rmarkdown); library(utils); render('input.Rmd', 'pdf_document')"
Old Answer (circa 2012)
So, a number of people have suggested that Pandoc...
How do I create a round cornered UILabel on the iPhone?
...ers.
Create a UILabel instance and make it a subview of the RoundRectView.
Set the frame of the label to be a few pixels inset of the RoundRectView's bounds. (For example, label.frame = CGRectInset(roundRectView.bounds, 8, 8);)
You can place the RoundRectView on a view using Interface Builder if y...
How to tell if a string contains a certain character in JavaScript?
I have a page with a textbox where a user is supposed to enter a 24 character (letters and numbers, case insensitive) registration code. I used maxlength to limit the user to entering 24 characters.
...
PhoneGap Eclipse Issue - eglCodecCommon glUtilsParamSize: unknow param errors
I have just started on phonegap and trying to setup first basic minimal project in eclipse. I followed through the phonegap docs at http://docs.phonegap.com/en/edge/guide_platforms_android_index.md.html#Android%20Platform%20Guide
...
git discard all changes and pull from upstream
...two things you can do here–you can reclone the remote repo, or you can reset --hard to the common ancestor and then do a pull, which will fast-forward to the latest commit on the remote master.
To be concrete, here's a simple extension of Nevik Rehnel's original answer:
git reset --hard origin/m...
Initialization of all elements of an array to one default value in C++?
...
Using the syntax that you used,
int array[100] = {-1};
says "set the first element to -1 and the rest to 0" since all omitted elements are set to 0.
In C++, to set them all to -1, you can use something like std::fill_n (from <algorithm>):
std::fill_n(array, 100, -1);
In porta...