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Rails 2.3-style plugins and deprecation warnings running task in Heroku
... needed to be able to turn plugins on/off during my capistrano deployment, based on what flavor of the app I was deploying. Before I used config.plugins to specify what plugin to use. With this approach I'm using a "require" on config.before_configuration instead.
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How to calculate the number of occurrence of a given character in each row of a column of strings?
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If you don't want to leave base R, here's a fairly succinct and expressive possibility:
x <- q.data$string
lengths(regmatches(x, gregexpr("a", x)))
# [1] 2 1 0
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Escape a dollar sign in string interpolation
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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iOS 7 parallax effect in my view controller
...ks @Lucas! I have updated my answer to include the swift sample too. It is based on this one. Feel free to review it and do any changes needed.
– veducm
Jan 12 '15 at 13:41
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How can I generate an MD5 hash?
...ot true, the BigInteger.toString method will return the full number in the base specified. 0x0606 will be printed as 606, just trailing zeros are omitted,
– Spidey
Aug 29 '10 at 22:29
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Is the SQL WHERE clause short-circuit evaluated?
...se of proof that it works but can you be sure that as the load on your database increases, the tables grow to be bigger, and things get optimized and changed in the database, that conclusion will hold. I could not and therefore erred on the side of caution and used CASE in WHERE clause to ensure sho...
How to check if a string is a valid JSON string in JavaScript without using Try/Catch
...ew version of json2.js makes a more advanced parsing than above, but still based on a regexp replace ( from the comment of @Mrchief )
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How can I show hidden files (starting with period) in NERDTree?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Determine which element the mouse pointer is on top of in JavaScript
...t branches of the DOM tree may overlap each other.
The "visual" approach - Based on "visual" overlapping
This method uses document.elementFromPoint(x, y) to find the topmost element, temporarily hide it (since we recover it immediately in the same context, the browser will not actually renders this)...
How do I invert BooleanToVisibilityConverter?
...r<Visibility>
{
public BooleanToVisibilityConverter() :
base(Visibility.Visible, Visibility.Collapsed) {}
}
Finally, this is how you could use BooleanToVisibilityConverter above in XAML and configure it to, for example, use Collapsed for true and Visible for false:
<Applicat...