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Create Directory if it doesn't exist with Ruby
... system will launch /bin/sh to parse the mkdir -p "foo/bar" string and then the shell will run /bin/mkdir. So you're doing extra work (create the command string, launch /bin/sh to pull it apart again) and some of that extra work leaves you open to shell injection attacks (spend some time in ...
Apply formula to the entire column
... copy the formula to all cells. Make sure you CLEAR your column data first and only apply your formula to one. The above answer with "ArrayFormula" seems to be able to apply a many cells to one formula, which is not what OP wanted.
– Thanasis Kapelonis
May 3 '1...
What is a Windows Handle?
What is a "Handle" when discussing resources in Windows? How do they work?
7 Answers
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R apply function with multiple parameters
I have a function f(var1, var2) in R. Suppose we set var2 = 1 and now I want to apply the function f() to the list L . Basically I want to get a new list L* with the outputs
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Site does not exist error for a2ensite
... Weird! This used to work fine without an extension in Ubuntu 12.04 and 12.10.
– FloatingRock
Mar 26 '14 at 11:21
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Does .NET have a way to check if List a contains all items in List b?
... }
}
This checks whether there are any elements in b which aren't in a - and then inverts the result.
Note that it would be slightly more conventional to make the method generic rather than the class, and there's no reason to require List<T> instead of IEnumerable<T> - so this would p...
Is it possible to set async:false to $.getJSON call
...I have found the convenience method $.getJSON() to almost never be useful, and always end up using $.ajax().
– Jacob Marble
Oct 8 '12 at 6:27
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Running Selenium WebDriver python bindings in chrome
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You need to make sure the standalone ChromeDriver binary (which is different than the Chrome browser binary) is either in your path or available in the webdriver.chrome.driver environment variable.
see http://code.google.com/p/selenium/wiki/ChromeDrive...
How to go from Blob to ArrayBuffer
I was studying Blobs, and I noticed that when you have an ArrayBuffer, you can easily convert this to a Blob as follows:
6 ...
Making button go full-width?
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tested with bootstrap V3 and "btn-block" worked for me
– Buddhika Alwis
Mar 10 '17 at 6:04
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