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Check for installed packages before running install.packages() [duplicate]
...h several users on different computers. One of its lines contains the install.packages("xtable") command.
16 Answers
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How to disable a link using only CSS?
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This now works in all modern browsers including IE 11. If you need support for IE 10 and below, you can use a JavaScript polyfill such as this one.
– Keavon
Jul 31 '14 at 5:13
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How to empty a Heroku database
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Thank you. Actually, "heroku pg:reset --db SHARED_DATABASE_URL" did the trick. But you got me going in the right direction.
– Jay Godse
Mar 17 '11 at 22:17
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Find first element in a sequence that matches a predicate
...yntax with () creates a generator, which is more efficient than generating all the list at once with [].
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Visual Studio Post Build Event - Copy to Relative Directory Location
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ie. Use $(SolutionDir)\..\.. to get your base directory.
For list of all macros, see here:
http://msdn.microsoft.com/en-us/library/c02as0cs.aspx
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Missing styles. Is the correct theme chosen for this layout?
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What I usually do is the following: a Gradle Clean, Rebuild and Sync all my Gradle files. After that I restart Android Studio, and I go to:
Select Theme -> Project Themes -> AppTheme
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How do I set the offset for ScrollSpy in Bootstrap?
...s not affect scrolling. This means anybody using a fixed-top needs to manually adjust in this manner.
– Brian Smith
Aug 6 '12 at 10:49
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How to get equal width of input and select fields
...the form, I have one select and two input fields. These elements are vertically aligned. Unfortunately, I can't get equal width of these elements.
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Case insensitive XPath contains() possible?
I'm running over all textnodes of my DOM and check if the nodeValue contains a certain string.
6 Answers
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Compare DATETIME and DATE ignoring time portion
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A small drawback in Marc's answer is that both datefields have been typecast, meaning you'll be unable to leverage any indexes.
So, if there is a need to write a query that can benefit from an index on a date field, then the fol...