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What's wrong with nullable columns in composite primary keys?

... 221 Primary keys are for uniquely identifying rows. This is done by comparing all parts of a key to ...
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How can I handle R CMD check “no visible binding for global variable” notes when my ggplot2 syntax i

... answered Feb 24 '12 at 23:10 HarlanHarlan 16.5k88 gold badges4141 silver badges5454 bronze badges ...
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How to scroll the window using JQuery $.scrollTo() function

I'm trying to scroll down 100px every time the user gets near the top of the document. 6 Answers ...
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How to use auto-layout to move other views when a view is hidden?

.... I tried to set UIView leading constraint to Superview (Cell content) for 10px and UILabels leading Constraints for 10 px to the next view (UIView). Later in my code ...
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Remove HTML Tags in Javascript with Regex

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jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

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How do I install a module globally using npm?

...r -g The general recommendations concerning npm module installation since 1.0rc (taken from blog.nodejs.org): If you’re installing something that you want to use in your program, using require('whatever'), then install it locally, at the root of your project. If you’re installing...
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Test if a property is available on a dynamic variable

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Including all the jars in a directory within the Java classpath

... 1176 Using Java 6 or later, the classpath option supports wildcards. Note the following: Use stra...
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How do I get currency exchange rates via an API such as Google Finance? [closed]

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