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What is the difference between object keys with quotes and without quotes?
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answered Dec 3 '10 at 18:10
bdukesbdukes
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How Pony (ORM) does its tricks?
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1 0 LOAD_FAST 0 (.0)
>> 3 FOR_ITER 26 (to 32)
6 STORE_FAST 1 (c)
9 LOAD_FAST 1 (c)
12 LOAD_ATTR 0 (country)
15 LOAD_CONST ...
How to extract text from a string using sed?
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answered Jul 19 '12 at 20:39
tripleeetripleee
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Filter element based on .data() key/value
...atBaroqueBobcat
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6
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How to create a temporary directory?
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350
Use mktemp -d. It creates a temporary directory with a random name and makes sure that file do...
Regular expression: find spaces (tabs/space) but not newlines
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answered Aug 27 '10 at 10:03
LekensteynLekensteyn
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Getting current unixtimestamp using Moment.js
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abagshaw
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answered Aug 26 '14 at 15:18
Matt Johnson-PintMatt...
Convert column classes in data.table
...rter)]
str(dtnew)
Classes ‘data.table’ and 'data.frame': 10 obs. of 3 variables:
$ ID : Factor w/ 2 levels "A","B": 1 1 1 1 1 2 2 2 2 2
$ Quarter: chr "1" "2" "3" "4" ...
$ value : num -0.838 0.146 -1.059 -1.197 0.282 ...
Using lapply and as.character:
dtnew <- dt[, lapply(....