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Assign multiple columns using := in data.table, by group
... hi hello 2.5 5 10 15
# 2: 2 2 hi hello 3.5 7 14 21
# 3: 3 3 hi hello 4.5 9 18 27
# 4: 1 4 hi hello 2.5 5 10 15
# 5: 2 5 hi hello 3.5 7 14 21
# 6: 3 6 hi hello 4.5 9 18 27
x[ , get("mynames") := list(mean(b) * 4, sum(b...
fork() branches more than expected?
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answered Jun 21 '12 at 6:58
wallykwallyk
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Multiline syntax for piping a heredoc; is this portable?
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edited May 20 '12 at 21:04
answered Aug 12 '11 at 22:21
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Android Studio - local path doesn't exist
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edited Mar 21 '14 at 13:52
answered Oct 21 '13 at 14:15
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What is the iPad user agent?
...zilla/5.0(iPad; U; CPU iPhone OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B314 Safari/531.21.10
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How to empty a redis database?
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– Alex Naspo
Nov 10 '14 at 21:21
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@AlexNaspo potentially problematic since the bigger y...
sqlalchemy flush() and get inserted id?
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answered Feb 22 '11 at 20:21
dpbdpb
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Stanislav PoslavskyStanislav Poslavsky
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Rails how to run rake task
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answered Apr 12 '11 at 21:24
Andrew MarshallAndrew Marshall
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