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How do I add a ToolTip to a control?

I have some controls that I would like to display a ToolTip for when the mouse is hovering over it. How can I do this? I would like to know how to do this properly in code, but also in the designer (There is a ToolTip component in the toolbox, but I don't quite.. get it). ...
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What does the question mark in Java generics' type parameter mean?

This is a small snippet of code taken from some of the examples that accompany the Stanford Parser. I've been developing in Java for about 4 years, but have never had a very strong understanding of what this style of code is supposed to indicate. ...
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sqlite database default time value 'now'

Is it possible in a sqlite database to craete a table that has a timestamp column that default to DATETIME('now') ? 7 Ans...
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What is data oriented design?

I was reading this article , and this guy goes on talking about how everyone can greatly benefit from mixing in data oriented design with OOP. He doesn't show any code samples, however. ...
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Git Cherry-pick vs Merge Workflow

Assuming I am the maintainer of a repo, and I want to pull in changes from a contributor, there are a few possible workflows: ...
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conditional unique constraint

I have a situation where i need to enforce a unique constraint on a set of columns, but only for one value of a column. 6 A...
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When to use , tag files, composite components and/or custom components?

I started using JSF 2.0 with Facelets recently and got puzzled by new composite components knowing existing <ui:include> and other templating techniques offered by Facelets 1.x. ...
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How can bcrypt have built-in salts?

Coda Hale's article "How To Safely Store a Password" claims that: 4 Answers 4 ...
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“Add unimplemented methods” feature in the Android Studio

In the Eclipse IDE there is a great feature allows you to add (implement) all of the required methods of the particular class. I'm looking for this feature in the Android Studio IDE, but without success so far. Is there something similar? For me it is one of the key-features and can't live without. ...
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val-mutable versus var-immutable in Scala

Are there any guidelines in Scala on when to use val with a mutable collection versus using var with an immutable collection? Or should you really aim for val with an immutable collection? ...