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Why is `[` better than `subset`?
...eval(expr, envir, enclos) : object 'cyl' not found
because R no longer "knows" where to find the object called 'cyl'. He also points out the truly bizarre stuff that can happen if by chance there is an object called 'cyl' in the global environment:
cyl <- 4
subscramble(mtcars, cyl == 4)
cyl &...
Give examples of functions which demonstrate covariance and contravariance in the cases of both over
...t = aList;
List<? super String> contravariantList = aList;
You can now access all methods of covariantList that doesn't take a generic parameter (as it must be something "extends Object"), but getters will work fine (as the returned object will always be of type "Object")
The opposite is tr...
How to add -Xlint:unchecked to my Android Gradle based project?
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For deprecation, you can now use this in gradle kotlin script, which is better than modifying compilerArgs because it's type-safe:
tasks.withType<JavaCompile> {
options.isDeprecation = true
}
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How can I get a list of Git branches, ordered by most recent commit?
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And now you can do this with git branch, so getting local, remote or all branches works like on git-branch (i.e. -r, -a). git branch -r --sort=committerdate --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(colo...
Regex how to match an optional character
I have a regex that I thought was working correctly until now. I need to match on an optional character. It may be there or it may not.
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Add .gitignore to gitignore
...n my particular case I have a symlink that contains a .gitignore file, and now when I want to commit, git tries to include that .gitignore file. This seems like a perfect use-case IMO.
– xorinzor
Aug 9 at 14:12
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git: Your branch is ahead by X commits
... to clean HEAD to the same as remote.
git reset --hard origin/master
So now I have again:
On branch master
Your branch is up-to-date with 'origin/master'.
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Split large string in n-size chunks in JavaScript
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As this answer is now nearly 3 years old, I wanted to try the performance test made by @Vivin again. So FYI, splitting 100k characters two by two using the given regex is instantaneous on Chrome v33.
– aymericbeaumet
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NoSQL - MongoDB vs CouchDB [closed]
...s to the NoSQL movement. I have heard lots about MongoDB and CouchDB. I know there are differences between the two. Which do you recommend learning as a first step into the NoSQL world?
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How to determine if a type implements a specific generic interface type
..." .... I'm exploring c# and I'm a more then bit disappointed in .net right now ...
– Sofija
Mar 5 '12 at 22:12
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