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Comment out text in R Markdown (Rmd file)
...o html or pdf. I think the HTML comment characters are only dealt with by pandoc/rmarkdown after knitting.
– randy
Jul 12 '19 at 21:57
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What is the difference between require and require-dev sections in composer.json?
I'm beginning using composer, I know so little about it and have a little experience with web application development.
6 An...
Ruby combining an array into one string
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To add to what @sepp2k said: join tries #to_str first and #to_s second.
– Greg Navis
Dec 17 '16 at 11:08
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cancelling queued performSelector:afterDelay calls
...selector(mySel:) withObject:nil afterDelay:5.0];
// cancel the above call (and any others on self)
[NSObject cancelPreviousPerformRequestsWithTarget:self];
See apple docs, it's right at the end of the performSelector:withObject:afterDelay: description.
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ASP.NET MVC Controller Naming Pluralization
...ions.
It's my personal opinion but what matters is that you pick a scheme and be consistent!
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Haskell: Converting Int to String
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Note that some organizations/standards strongly discourage the use of "show" because of its extreme polymorphism. A type-specific function (or, worst case, wrapper around show) would be helpful.
– Jon Watte
Mar 27 '15...
Redirect to Action in another controller
... One of them, lets call it Controller A , is in an Area called Admin and the other, lets call it Controller B , is not in any Area (I guess that means it's in the default Area ?). Controller B has an action method called Login . I have an action method in Controller A , which has...
Run JavaScript when an element loses focus
I have a standard HTML input that I want to run JavaScript code when it loses focus. Sadly my Google searches did not reveal how to do this.
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What is the difference between gsub and sub methods for Ruby Strings
I have been perusing the documentation for String today, and I saw the :sub method, which I'd never noticed before. I've been using :gsub and it appears that they are essentially the same. Can anyone explain the difference to me? Thanks!
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Using sed and grep/egrep to search and replace
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Use this command:
egrep -lRZ "\.jpg|\.png|\.gif" . \
| xargs -0 -l sed -i -e 's/\.jpg\|\.gif\|\.png/.bmp/g'
egrep: find matching lines using extended regular expressions
-l: only list matching filenames
-R: search recursively th...