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Rails: where does the infamous “current_user” come from?
... that there are a lot of references to current_user . Does this only come from Devise? and do I have to manually define it myself even if I use Devise? Are there prerequisites to using current_user (like the existence of sessions, users, etc)?
...
Get local href value from anchor (a) tag
...ps%3a%2f%2fstackoverflow.com%2fquestions%2f15439853%2fget-local-href-value-from-anchor-a-tag%23new-answer', 'question_page');
}
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How to plot two histograms together in R?
... new column in each that will be
# a variable to identify where they came from later.
carrots$veg <- 'carrot'
cukes$veg <- 'cuke'
# and combine into your new data frame vegLengths
vegLengths <- rbind(carrots, cukes)
After that, which is unnecessary if your data is in long format already...
How to use HTML Agility pack
...ml
htmlDoc.Load(filePath);
// Use: htmlDoc.LoadHtml(xmlString); to load from a string (was htmlDoc.LoadXML(xmlString)
// ParseErrors is an ArrayList containing any errors from the Load statement
if (htmlDoc.ParseErrors != null && htmlDoc.ParseErrors.Count() > 0)
{
// Handle any pa...
How to create SBT project with IntelliJ Idea?
...m/display/SCA/Scala+Plugin+for+IntelliJ+IDEA or can be installed directoly from within the IDE using Settings -> Plugins dialog. Afterwards one can just do File -> New Project -> Scala -> SBT based. IntelliJ will generate basic build.sbt, download necessary dependencies and open project....
How do I embed a single file from a GitHub gist with the new gist interface?
...
Take the gist URL from the left-hand side and after the .js add a query string like ?file=myFile.blah, e.g.
<script src="https://gist.github.com/4505639.js?file=macroBuild.scala" type="text/javascript"></script>
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RSS Feeds in ASP.NET MVC
...ou want to return rss and set the return type as RssResult. Grab the data from your model based on what you want to return.
Then any request to this action will receive rss of whatever data you choose.
That is probably the quickest and reusable way of returning rss has a response to a request in ...
Understanding “randomness”
... {50000}],
0.01]]
And here you can see the road from a uniform to a normal distribution by adding up 1, 2, 4, 6, 10 and 20 uniformly distributed random variables:
Edit
A few credits
Thanks to Thomas Ahle for pointing out in the comments that the probability distributi...
How to shut down the computer from C#
What's the best way to shut down the computer from a C# program?
16 Answers
16
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What is Weak Head Normal Form?
...general that every subexpression will be needed, expressions are evaluated from the outside in.
(GHC has a strictness analyzer that will detect some situations where a subexpression is always needed and it can then evaluate it ahead of time. This is only an optimization, however, and you should not...