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CALayer with transparent hole in it

I have a simple view (left side of the picture) and i need to create some kind of overlay (right side of the picture) to this view. This overlay should have some opacity, so the view bellow it is still partly visible. Most importantly this overlay should have a circular hole in the middle of it so i...
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Ruby on Rails: getting the max value from a DB column

... Assuming your model name is Bar and it has a column named bar, this should work: Bar.maximum("bar") See the excellent Rails Guides section on Calculations for more info. share ...
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How can I pass parameters to a partial view in mvc 4

... Your question is hard to understand, but if I'm getting the gist, you simply have some value in your main view that you want to access in a partial being rendered in that view. If you just render a partial with just the partial name: @Html.Partial("_SomeP...
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How to not run an example using roxygen2?

... relies on having a Bing Maps Key. Obviously I'd rather not publish mine, and the examples fail without one. 4 Answers ...
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NUnit vs. xUnit

What are the differences between NUnit and xUnit.net ? What's the point of developing two of them, not only one? 4 Answe...
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Write string to text file and ensure it always overwrites the existing content.

I have a string with a C# program that I want to write to a file and always overwrite the existing content. If the file isn't there, the program should create a new file instead of throwing an exception. ...
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Differences between Agda and Idris

I'm starting to dive into dependently-typed programming and have found that the Agda and Idris languages are the closest to Haskell, so I started there. ...
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Adding and removing style attribute from div with jquery

I've inherited a project I'm working on and I'm updating some jquery animations (very little practice with jquery). 7 Answe...
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“unary operator expected” error in Bash if condition

...it's much easier to always use the double bracket conditional compound command [[ ... ]], instead of the Posix-compatible single bracket version [ ... ]. Inside a [[ ... ]] compound, word-splitting and pathname expansion are not applied to words, so you can rely on if [[ $aug1 == "and" ]]; to co...
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How to convert int to NSString?

...s with @() expression. So the shortest way is to transform int to NSNumber and pick up string representation with stringValue method: NSString *strValue = [@(myInt) stringValue]; or NSString *strValue = @(myInt).stringValue; ...