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What GRANT USAGE ON SCHEMA exactly do?

I'm trying to create for the first time a Postgres database, so this is probably a stupid question. I assigned basic read-only permissions to the db role that must access the database from my php scripts, and I have a curiosity: if I execute ...
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How exactly do Django content types work?

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Transitioning from Windows Forms to WPF

... other posts. For instance, you can switch from the Winforms-like margin-based layout that is the default when you drop a control, to a more WPF-ish style by right-clicking and selecting 'Reset Layout' This video covers similar ground. I still prefer the VS2010 designer on balance - VS2013 seems...
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How do I adjust the anchor point of a CALayer, when Auto Layout is being used?

...d it works on iOS 8 and iOS 9. Like adjust anchorPoint when you use frame-based layout: let oldFrame = layerView.frame layerView.layer.anchorPoint = newAnchorPoint layerView.frame = oldFrame When you adjust view's anchor with auto layout, you do the same thing but in constraints way. When anchor...
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Difference between

... Based on Bert F's answer I would like to explain my understanding. Lets say we have 3 classes as public class Fruit{} public class Melon extends Fruit{} public class WaterMelon extends Melon{} Here We have List<? ex...
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How to pass objects to functions in C++?

...ss by a non-const lvalue reference, you pass objects of derived classes as base classes, in which case you need to pass by reference. (Use the previous rules to determine whether to pass by const reference or not.) Passing by pointer is virtually never advised. Optional parameters are best expresse...
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What is the difference between active and passive FTP?

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INNER JOIN vs LEFT JOIN performance in SQL Server

... I want to point out that there is basically no database documentation to support the idea that inner joins and outer joins performance differently. Outer joins are slightly more expensive than inner joins, because of the volume of the data and the size of the result set. Ho...
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What’s the difference between ScalaTest and Scala Specs unit test frameworks?

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OAuth 2.0: Benefits and use cases — why?

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