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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
When using summarise with plyr 's ddply function, empty categories are dropped by default. You can change this behavior by adding .drop = FALSE . However, this doesn't work when using summarise with dplyr . Is there another way to keep empty categories in the result?
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Catching error codes in a shell pipe
I currently have a script that does something like
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Code equivalent to the 'let' keyword in chained LINQ extension method calls
Using the C# compilers query comprehension features, you can write code like:
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What is the effect of encoding an image in base64?
If I convert an image (jpg or png) to base64, then will it be bigger, or will it have the same size? How much greater will it be?
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Convert JSON style properties names to Java CamelCase names with GSON
I'm using GSON to convert JSON data I get to a Java object. It works pretty well in all my tests.
The problem is that our real objects have some properties named like is_online. GSON only maps them if they are named totally equal, it would be nice to have GSON convert the names to Java camel case ...
Get underlying NSData from UIImage
I can create UIImage from NSData using [UIImage imageWithData:] or [UIImage initWithData:] methods.
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Archive the artifacts in Jenkins
Could someone please explain to me the idea of artifacts in the build process?
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nodejs require inside TypeScript file
...o I load a regular NodeJS module (from node_modules ) from within a TypeScript class?
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How to get commit history for just one branch?
Let's say I created a new branch my_experiment from master and made several commits to my_experiment . If I do a git log when on my_experiment , I see the commits made to this branch, but also the commits made to master before the my_experiments branch was created.
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