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Sorting multiple keys with Unix sort
I have potentially large files that need to be sorted by 1-n keys. Some of these keys might be numeric and some of them might not be. This is a fixed-width columnar file so there are no delimiters.
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Get the last non-empty cell in a column in Google Sheets
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16 Answers
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SHA-1 fingerprint of keystore certificate
Is the method for getting a SHA-1 fingerprint the same as the method of getting the a fingerprint? Previously, I was running this command:
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Can hash tables really be O(1)?
It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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'Must Override a Superclass Method' Errors after importing a project into Eclipse
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13 Answers
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Redirect Windows cmd stdout and stderr to a single file
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1111
You want:
dir > a.txt 2>&1
The syntax 2>&1 will redirect 2 (stderr) to 1 ...
How many files can I put in a directory?
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21 Answers
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Extract every nth element of a vector
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163
a <- 1:120
b <- a[seq(1, length(a), 6)]
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