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When should I use UNSIGNED and SIGNED INT in MySQL?

...e's a table of the ranges of values each INTEGER type can store: Source: http://dev.mysql.com/doc/refman/5.6/en/integer-types.html UNSIGNED ranges from 0 to n, while signed ranges from about -n/2 to n/2. In this case, you have an AUTO_INCREMENT ID column, so you would not have negatives. Thus, u...
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Grouping functions (tapply, by, aggregate) and the *apply family

...se *apply functions (from the intro to plyr document from the plyr webpage http://had.co.nz/plyr/) Base function Input Output plyr function --------------------------------------- aggregate d d ddply + colwise apply a a/l aaply / alply by ...
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Are there any open source C libraries with common data structures? [closed]

... The GDSL Library might be a good thing to consider: http://home.gna.org/gdsl/ share | improve this answer | follow | ...
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What is the Sign Off feature in Git for?

...ff-by: Project Maintainer <project.maintainer@example.com> Source: http://gerrit.googlecode.com/svn/documentation/2.0/user-signedoffby.html share | improve this answer | ...
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Is it possible to open a Windows Explorer window from PowerShell?

...shell prompt. Using this method, you can also pass cmd-line arguments (see http://support.microsoft.com/kb/314853) The Invoke-Item cmdlet provides a way to run an executable file or to open a file (or set of files) from within Windows PowerShell. Alias: ii use system.diagnostics.process Examples: ...
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How to get the containing form of an input?

...')); Also, see this MDN link on the form property of HTMLInputElement: https://developer.mozilla.org/en/DOM/HTMLInputElement#Properties share | improve this answer | fol...
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How to disable “Save workspace image?” prompt in R?

...k on "Properties", and add --no-save to the command that starts R. (from http://tolstoy.newcastle.edu.au/R/help/05/03/1115.html) If you are using a different editor than Rgui, you have to pass --no-save to the R command line when starting R ...
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ping response “Request timed out.” vs “Destination Host unreachable”

...acket filtering, routing error, or a silent discard. For more info Refer: http://technet.microsoft.com/en-us/library/cc940095.aspx share | improve this answer | follow ...
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How to get document height and width without using jquery

... Even the last example given on http://www.howtocreate.co.uk/tutorials/javascript/browserwindow is not working on Quirks mode. Easier to find than I thought, this seems to be the solution(extracted from latest jquery code): Math.max( document.documentE...
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What exactly is a Context in Java? [duplicate]

...of contexts used in Java today. Edit -- You mention Android. Look here: http://developer.android.com/reference/android/content/Context.html You can see how this Context gives you all sorts of information about where the Android app is deployed and what's available to it. ...