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How to combine multiple conditions to subset a data-frame using “OR”?
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254
my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics...
How many bytes does one Unicode character take?
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12 Answers
12
Active
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Move the most recent commit(s) to a new branch with Git
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6726
+50
Moving t...
What is the difference between `let` and `var` in swift?
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The let keyword defines a constant:
let theAnswer = 42
The theAnswer cannot be changed afterwards. This is why anything weak can't be written using let. They need to change during runtime and you must be using var instead.
The var defines an ordinary variable.
What is inte...
Set a persistent environment variable from cmd.exe
...s' that are displayed if you print the usage (setx /?), in particular:
2) On a local system, variables created or modified by this tool will be available in future command windows but not in the current CMD.exe command window.
3) On a remote system, variables created or modified by this too...
How to install Hibernate Tools in Eclipse?
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answered Jan 27 '09 at 14:11
tremortremor
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Scala: What is a TypeTag and how do I use it?
... List[Foo] => "list of foos"
}
we will get warnings:
<console>:23: warning: non-variable type argument String in type pattern List[String]↩
is unchecked since it is eliminated by erasure
case _: List[String] => "list of strings"
^
<console>:24: warnin...
How do I write JSON data to a file?
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2137
You forgot the actual JSON part - data is a dictionary and not yet JSON-encoded. Write it lik...
How to get key names from JSON using jq
...tBox", "Manifest-Version" : "1.0", "appname" : "testApp", "build-date" : "02-03-2014-13:41", "version" : "testBox" }
$ jq 'keys' file.json
[
"Archiver-Version",
"Build-Id",
"Build-Jdk",
"Build-Number",
"Build-Tag",
"Built-By",
"Created-By",
"Implementation-Title",
"Implementation-...
How can I handle time zones in my webapp?
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answered Jun 7 '12 at 2:40
Niet the Dark AbsolNiet the Dark Absol
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