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List distinct values in a vector in R
How can I list the distinct values in a vector where the values are replicative? I mean, similarly to the following SQL statement:
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ViewPager PagerAdapter not updating the View
I'm using the ViewPager from the compatibility library. I have succussfully got it displaying several views which I can page through.
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How to capture Curl output to a file?
I have a text document that contains a bunch of URLs in this format:
7 Answers
7
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MySQL InnoDB not releasing disk space after deleting data rows from table
I have one MySQL table using the InnoDB storage engine; it contains about 2M data rows. When I deleted data rows from the table, it did not release allocated disk space. Nor did the size of the ibdata1 file reduce after running the optimize table command.
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ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
I am an electrical engineer who mainly plays around with power systems instead of programming. Recently, I have been following a manual to install a software suite on Ubuntu. I have no knowledge of mySQL at all, actually. I have done the following installations on my Ubuntu.
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Regex match everything after question mark?
I have a feed in Yahoo Pipes and want to match everything after a question mark.
6 Answers
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How to increase the maximum number of opened editors in IntelliJ?
I am building a grails-app with IntelliJ 9.0 and I am a huge fan of the CTR+TAB shortcut that switches between active editors.
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How to get domain URL and application name?
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The web application name (actually the context path) is available by calling HttpServletrequest#getContextPath() (and thus NOT getServletPath() as one suggested before). You can retrieve this in JSP by ${pageContext.request.contextPath}.
<p>The context path is: ${pageContext.request.contex...
How to get the host name of the current machine as defined in the Ansible hosts file?
I'm setting up an Ansible playbook to set up a couple servers. There are a couple of tasks that I only want to run if the current host is my local dev host, named "local" in my hosts file. How can I do this? I can't find it anywhere in the documentation.
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postgres: upgrade a user to be a superuser?
In postgres, how do I change an existing user to be a superuser? I don't want to delete the existing user, for various reasons.
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