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Android Studio suddenly cannot resolve symbols

...e imports and AS seems to be telling me it can't find android.support.v4 all of a sudden (offering me the option to remove the unused imports). ( android.support.v7 seems to be fine though). ...
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Eclipse comment/uncomment shortcut?

... Use Ctrl + SHIFT + L which will open a list of all major shortcuts for eclipse. For single line java code comment and uncomment : Ctrl + / (Forward Slash) For multiple line java code comment : Ctrl + Shift + / (Forward Slash) and Multiline uncomment : Ctrl + Shift + \ ...
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Regular Expressions: Is there an AND operator?

... It should be mentioned that this particular example is called a positive lookahead assertion. It has other uses than "and". Note that the text isn't consumed. – strager Jan 22 '09 at 21:11 ...
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Casting vs using the 'as' keyword in the CLR

...d within the if body.) That's slightly annoying in some cases, so if you really care about introducing the smallest number of variables possible in every scope, you might still want to use is followed by a cast. I don't think any of the answers so far (at the time of starting this answer!) have r...
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SQL command to display history of queries

... try cat ~/.mysql_history this will show you all mysql commands ran on the system share | improve this answer | follow | ...
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Interface/enum listing standard mime-type constants

...mons, jax, jboss, javax) for an interface or enum that lists the values of all the standard mime-type (aka content-type). 1...
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Get file name from URL

... edited Jan 24 '18 at 1:17 buræquete 12.5k44 gold badges3131 silver badges6262 bronze badges answered Mar 3 '09 at 9:33 ...
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How to reset db in Django? I get a command 'reset' not found error

... It looks like the 'flush' answer will work for some, but not all cases. I needed not just to flush the values in the database, but to recreate the tables properly. I'm not using migrations yet (early days) so I really needed to drop all the tables. Two ways I've found to drop all ...
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Using Excel OleDb to get sheet names IN SHEET ORDER

...ABLE_NAME"].ToString(); i++; } // Loop through all of the sheets if you want too... for(int j=0; j < excelSheets.Length; j++) { // Query each excel sheet. } return excelSheets; } catch(Exception ex) { return ...
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Understanding Python's “is” operator

What does it really mean? 11 Answers 11 ...