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Can dplyr package be used for conditional mutating?

Can the mutate be used when the mutation is conditional (depending on the values of certain column values)? 5 Answers ...
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What ports does RabbitMQ use?

What ports does RabbitMQ Server use or need to have open on the firewall for a cluster of nodes? 4 Answers ...
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Seeding the random number generator in Javascript

Is it possible to seed the random number generator (Math.random) in Javascript? 13 Answers ...
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The name 'model' does not exist in current context in MVC3

I added a cshtml page in an project. When I tried to add the following declaration to it, I get an error: "The name 'model' does not exist in current context". ...
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Differences between Oracle JDK and OpenJDK

Are there any crucial differences between Oracle and OpenJDK? 11 Answers 11 ...
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How to calculate the number of occurrence of a given character in each row of a column of strings?

I have a data.frame in which certain variables contain a text string. I wish to count the number of occurrences of a given character in each individual string. ...
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Getting individual colors from a color map in matplotlib

If you have a Colormap cmap , for example: 4 Answers 4 ...
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iOS White to Transparent Gradient Layer is Gray

I have a CAGradientLayer inserted to the bottom of this small detail view that pops up at the bottom of the app. As you can see, I've set the colors from white to clear, but there's this strange gray tint that is showing up. Any ideas? ...
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Constructor overload in TypeScript

Has anybody done constructor overloading in TypeScript. On page 64 of the language specification (v 0.8), there are statements describing constructor overloads, but there wasn't any sample code given. ...
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How to round a number to significant figures in Python

I need to round a float to be displayed in a UI. E.g, to one significant figure: 20 Answers ...