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How do you delete a column by name in data.table?
...hough data.table is gradually moving away from using this argument so it's now discouraged where you can avoid it; showing here so you know the option exists in case you really do need it:
# Method 5a (like Method 3)
df3[, !"foo", with=FALSE]
# Method 5b (like Method 4)
df3[, !grep("^foo$", names(...
How to install the JDK on Ubuntu Linux
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As of March 2019 the ppa was disabled and now 99% of the answer regarding this issue around the internet cannot be used anymore.
– Tobbey
Apr 29 '19 at 12:35
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How can I obtain an 'unbalanced' grid of ggplots?
...with grid and thought I had it down but ended up failing (although looking now at the code in the function I cite below, I can see that I was really close ... :-)
The 'wq' package has a layOut function that will do it for you:
p1 <- qplot(mpg, wt, data=mtcars)
layOut(list(p1, 1:3, 1), # takes...
What is the cleanest way to ssh and run multiple commands in Bash?
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This has the great advantage that you know exactly what is being executed by the remote script - no problems with quoting. If you need dynamic commands, you can use a shell script with a subshell, still piping into the ssh, i.e. ( echo $mycmd $myvar ; ...) | ssh ...
How do I run Redis on Windows?
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looks like work stopped at 3.2 pre-release but redis is now on 4.0
– BaltoStar
Nov 20 '17 at 18:08
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How do you prevent IDisposable from spreading to all your classes?
...use a future version might actually do something important in Dispose, and now you're got a hard to track down leak.
– Andy
Aug 25 '15 at 21:50
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How to remove k__BackingField from json when Deserialize
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Now I am wondering why I thought I needed [Serializable] in the first place. My Xml serialization works without and JSON works without it.
– Rhyous
Mar 3 '15 at 22:19
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Rotating and spacing axis labels in ggplot2
...tor whose labels are long. While probably not an ideal visualization, for now I'd like to simply rotate these labels to be vertical. I've figured this part out with the code below, but as you can see, the labels aren't totally visible.
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How do I view events fired on an element in Chrome DevTools?
...ect wanted element) then go to Console tab and write:
monitorEvents($0)
Now when you move mouse over this element, focus or click it, the name of the fired event will be displayed with its data.
To stop getting this data just write this to console:
unmonitorEvents($0)
$0 is just the last DOM ...
How do I set environment variables from Java?
...cessBuilders through it before starting them.
Also, you probably already know this, but you can start more than one process with the same ProcessBuilder. So if your subprocesses are the same, you don't need to do this setup over and over.
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