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How to sort with a lambda?
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BTRBTR
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How to change the DataTable Column Name?
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answered Jun 20 '11 at 5:47
MoonMoon
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Splitting String with delimiter
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tim_yatestim_yates
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Anonymous recursive PHP functions
...ns are objects...
– ellabeauty
Aug 14 '12 at 21:31
25
@ellabeauty in the time $factorial is passe...
Check if value is in select list with JQuery
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Lachlan RocheLachlan Roche
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Can you make just part of a regex case-insensitive?
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answered Sep 4 '08 at 12:35
EspoEspo
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Limit ggplot2 axes without removing data (outside limits): zoom
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answered Sep 5 '14 at 12:30
Tyler RinkerTyler Rinker
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How can I divide two integers to get a double?
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474
You want to cast the numbers:
double num3 = (double)num1/(double)num2;
Note: If any of the ...
Counting the Number of keywords in a dictionary in python
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429
len(yourdict.keys())
or just
len(yourdict)
If you like to count unique words in the file,...
Assign multiple columns using := in data.table, by group
...b col1 col2
# 1: 1 1 hi hello
# 2: 2 2 hi hello
# 3: 3 3 hi hello
# 4: 1 4 hi hello
# 5: 2 5 hi hello
# 6: 3 6 hi hello
x[ , c("mean", "sum") := list(mean(b), sum(b)), by = a][]
# a b col1 col2 mean sum
# 1: 1 1 hi hello 2.5 5
# 2: 2 2 hi hello 3.5 7
# 3: 3 3 hi hello ...