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How to find gaps in sequential numbering in mysql?

...lues were imported from another system. There is an auto-increment column, and there are no duplicate values, but there are missing values. For example, running this query: ...
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What is the difference between ? and Object in Java generics?

... An instance of HashMap<String, String> matches Map<String, ?> but not Map<String, Object>. Say you want to write a method that accepts maps from Strings to anything: If you would write public void foobar(Map<String, Object> ms...
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How to use `string.startsWith()` method ignoring the case?

I want to use string.startsWith() method but ignoring the case. 8 Answers 8 ...
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What do I have to do to get Core Data to automatically migrate models?

...AndKeys: [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption, [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil]; NSError *error; _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectMod...
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Why would you use String.Equals over ==? [duplicate]

I recently was introduced to a large codebase and noticed all string comparisons are done using String.Equals() instead of == ...
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Run an OLS regression with Pandas Data Frame

I have a pandas data frame and I would like to able to predict the values of column A from the values in columns B and C. Here is a toy example: ...
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Lombok is not generating getter and setter

... When starting with a fresh eclipse installation you, in fact, need to "install" Lombok before being able to use it. Go where you Lombok jar is (e.g. (e.g. you can find in ~/.m2/repository/org/projectlombok/lombok/1.16.10/lombok-1.16.10.jar), run it (Example: jav...
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TypeError: not all arguments converted during string formatting python

... The error is in your string formatting. The correct way to use traditional string formatting using the '%' operator is to use a printf-style format string (Python documentation for this here: http://docs.python.org/2/library/string.html#format-s...
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How to avoid “too many parameters” problem in API design?

... Condensing all the strings into a string array only makes sense if they're all related. From the order of arguments, it looks like they're not all completely related. – icktoofay Jun 4 '11 at 21:16 ...
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boundingRectWithSize for NSAttributedString returning wrong size

I am trying to get the rect for an attributed string, but the boundingRectWithSize call is not respecting the size I pass in and is returning a rect with a single line height as opposed to a large height (it is a long string). I have experimented by passing in a very large value for the height and a...