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How to check if two arrays are equal with JavaScript? [duplicate]
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Fastest way to determine if an integer's square root is an integer
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How to profile a bash shell script slow startup?
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If you have GNU date (or another version that can output nanoseconds), do this at the beginnin...
How to determine equality for two JavaScript objects?
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Difference between break and continue statement
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Why do enum permissions often have 0, 1, 2, 4 values?
Why are people always using enum values like 0, 1, 2, 4, 8 and not 0, 1, 2, 3, 4 ?
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finding and replacing elements in a list
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Print all but the first three columns
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Mean per group in a data.frame [duplicate]
...aggregate was designed for:
d <- read.table(text=
'Name Month Rate1 Rate2
Aira 1 12 23
Aira 2 18 73
Aira 3 19 45
Ben 1 53 19
Ben 2 22 87
Ben 3 19 45
Cat 1 22 ...