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How to convert R Markdown to PDF?
...ension is .rmd and not .Rmd).
RMDFILE=example-r-markdown
Rscript -e "require(knitr); require(markdown); knit('$RMDFILE.rmd', '$RMDFILE.md'); markdownToHTML('$RMDFILE.md', '$RMDFILE.html', options=c('use_xhml'))"
and then this command to convert to pdf
Pandoc -s example-r-markdown.html -o exam...
YouTube API to fetch all videos on a channel
...e accessed. You can also find client libraries.
You could also make the requests yourself. Here is an example URL that retrieves the latest videos from a channel:
https://www.googleapis.com/youtube/v3/search?key={your_key_here}&channelId={channel_id_here}&part=snippet,id&order=date&...
How to pass all arguments passed to my bash script to a function of mine? [duplicate]
...y), and then reference them as e.g. "${args[0]}" etc (note that bash array indexes start at 0, so $1 will be in args[0], etc).
Leaving off the double-quotes, with either $@ or $*, will try to split each argument up into separate words (based on whitespace or whatever's in $IFS), and also try to expa...
How can I do division with variables in a Linux shell?
...ot by reading through the man-page for bash. Type man bash at the prompt (q to exit)
– paddy
Aug 7 '13 at 3:07
65
...
Retrieve only the queried element in an object array in MongoDB collection
...ion operator, where the $ in a projection object field name represents the index of the field's first matching array element from the query. The following returns the same results as above:
db.test.find({"shapes.color": "red"}, {_id: 0, 'shapes.$': 1});
MongoDB 3.2 Update
Starting with the 3.2 ...
How to reverse apply a stash?
...ho Howdy all >>messages
$ git diff
diff --git a/messages b/messages
index a5c1966..eade523 100644
--- a/messages
+++ b/messages
@@ -1 +1,3 @@
Hello, world
+Hello again
+Howdy all
$ git stash show -p | patch --reverse
patching file messages
Hunk #1 succeeded at 1 with fuzz 1.
$ git diff
dif...
Get host domain from URL?
...rts of a URI for the Uri.GetLeftPart method.
http://www.contoso.com/index.htm?date=today --> http://www.contoso.com
http://www.contoso.com/index.htm#main --> http://www.contoso.com
nntp://news.contoso.com/123456@contoso.com --> nntp://news.contoso.com
file://server/fil...
How to serve an image using nodejs
...s for most common files
serves HTML, JS, CSS, plain text and images
serves index.html as a default directory index
responds with error codes for missing files
no path traversal vulnerabilities
no race conditions while reading files
I tested every version on Node versions 4, 5, 6 and 7.
express.st...
IllegalMonitorStateException on wait() call
... almost 2 years old but still need to close this since I also came to this Q/A session with same issue...
Please read this definition of illegalMonitorException again and again...
IllegalMonitorException is thrown to indicate that a thread has attempted to wait on an object's monitor or to notify ...
ActionController::InvalidAuthenticityToken
...ich do caching.
As @toobulkeh commented this is not a vulnerability on :index, :show actions, but beware using this on :put, :post actions.
For example:
caches_page :index, :show
skip_before_filter :verify_authenticity_token, :only => [:index, :show]
Reference: http://api.rubyonrails.o...