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Scala list concatenation, ::: vs ++
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Legacy. List was originally defined to be functional-languages-looking:
1 :: 2 :: Nil // a list
list1 ::: list2 // concatenation of two lists
list match {
case head :: tail => "non-empty"
case Nil => "empty"
}
Of course, Scala evolved other collections, in an ad-hoc manner....
Can mustache iterate a top-level array?
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169
You can do it like this...
Mustache.render('<ul>{{#.}}<li>{{.}}</li>{{/.}}&...
How to delete a row by reference in data.table?
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125
Good question. data.table can't delete rows by reference yet.
data.table can add and delete c...
How to change a command line argument in Bash?
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152
You have to reset all arguments. To change e.g. $3:
$ set -- "${@:1:2}" "new" "${@:4}"
Basi...
Adding data attribute to DOM
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edited Dec 4 '13 at 4:58
answered Feb 18 '13 at 11:28
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How is Math.Pow() implemented in .NET Framework?
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edited Sep 21 at 1:51
Josh Stodola
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Automatic Preferred Max Layout Width is not available on iOS versions prior to 8.0
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10 Answers
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How can I upgrade specific packages using pip and a requirements file?
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10 Answers
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Label encoding across multiple columns in scikit-learn
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21 Answers
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Concatenate multiple files but include filename as section headers
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Was looking for the same thing, and found this to suggest:
tail -n +1 file1.txt file2.txt file3.txt
Output:
==> file1.txt <==
<contents of file1.txt>
==> file2.txt <==
<contents of file2.txt>
==> file3.txt <==
<contents of file3.txt>
If there is only...