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What is the reason for a red exclamation mark next to my project in Eclipse?

...rors can be seen in the Problems view, and if you open the view menu and select Group By > Java Problem Type, they all show up in the Build Path category: share | improve this answer ...
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Moving and vanishing lines of code; trouble with Eclipse's XML Editor

...t to Help > Install new software > What is already installed? Then I selected all the Android stuff from Google, selected Update, and now life is good again. – rodrigo-silveira Jan 7 '13 at 16:22 ...
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How to create a new database after initally installing oracle database 11g Express Edition?

... In the Connections pane, click the icon New Connection. The New/Select Database Connection window opens. In the New/Select Database Connection window, type the appropriate values in the fields Connection Name, Username, and Password. For security, the password characters that ...
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Xcode/Simulator: How to run older iOS version?

...e simulator from 3.2 onwards after upgrading. In the iPhone Simulator try selecting Hardware -> Version -> 3.2 share | improve this answer | follow | ...
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Is there a JSON equivalent of XQuery/XPath?

...g tools including filtering, recursive search, sorting, mapping, range selection, and flexible expressions with wildcard string comparisons and various operators. JSONselect has another point of view on the question (CSS selector-like, rather than XPath) and has a JavaScript implementation. ...
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How do I use installed packages in PyCharm?

...er's path. It will bring up a short drop-down menu, from which you should select "More..". On the right hand side of the new pop-up, there will be an icon with the mouse-over text of "Show paths for the selected interpreter". Click that button. This new 'Interpreter Paths' pop-up is where you ca...
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The identity used to sign the executable is no longer valid

... to Preferences --> Accounts --> View Details Press the + symbol and select iOS Development Press the refresh button in the lower left corner (called Download all in Xcode 7) PS: Sometimes it may also help to delete invalid provisioning profiles: right-click -> move to trash I saw this...
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How to find the kth largest element in an unsorted array of length n in O(n)?

...h order statistic. There's a very simple randomized algorithm (called quickselect) taking O(n) average time, O(n^2) worst case time, and a pretty complicated non-randomized algorithm (called introselect) taking O(n) worst case time. There's some info on Wikipedia, but it's not very good. Everything...
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Could not load file or assembly 'System.Data.SQLite'

... @Raul Vejar: please elaborate on how application pool selection feature of IIS Express solves the 32-bit/64-bit assembly issue. Thanks – Tim Aug 5 '14 at 17:00 ...
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How to interactively (visually) resolve conflicts in SourceTree / git

.... Then switch to the "Diff" tab. On the lower half, use the drop down to select the external program you want to use to do the diffs and merging. I've installed KDiff3 and like it well enough. When you're done, click OK. Now when there is a merge, you can go under Actions->Resolve Conflicts-...