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How to convert a color integer to a hex String in Android?
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The mask makes sure you only get RRGGBB, and the %06X gives you zero-padded hex (always 6 chars...
Exploitable PHP functions
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8
So many functions banned! Are you the host of my website by any chance?
– Randy the Dev
Sep 20 '10 at...
How to escape double quotes in JSON
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kamituelkamituel
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Copy array items into another array
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edited Apr 22 '14 at 18:15
Tom Wadley
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answered...
How to convert from System.Enum to base integer?
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fatal: The current branch master has no upstream branch
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VonCVonC
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Rails: select unique values from a column
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edited Mar 14 '18 at 4:51
answered Mar 11 '12 at 21:07
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What's the difference between REST & RESTful
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Justin EthierJustin Ethier
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data.table vs dplyr: can one do something well the other can't or does poorly?
...lows:
DT1 = data.table(x=c(1,1,1,1,2,2,2,2), y=c("a", "a", "b", "b"), z=1:8, key=c("x", "y"))
# x y z
# 1: 1 a 1
# 2: 1 a 2
# 3: 1 b 3
# 4: 1 b 4
# 5: 2 a 5
# 6: 2 a 6
# 7: 2 b 7
# 8: 2 b 8
DT2 = data.table(x=1:2, y=c("a", "b"), mul=4:3, key=c("x", "y"))
# x y mul
# 1: 1 a 4
# 2: 2 b 3
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Why can't decimal numbers be represented exactly in binary?
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Jon SkeetJon Skeet
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