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What are the differences between vector and list data types in R?
...tors are "atomic vectors" in strict R parlance:
aaa <- vector("list", 3)
is.list(aaa) #TRUE
is.vector(aaa) #TRUE
Lists are a "recursive" type (of vector) whereas atomic vectors are not:
is.recursive(aaa) # TRUE
is.atomic(aaa) # FALSE
You process data objects with different functions...
Base64 Decoding in iOS 7+
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439
Swift 3+
let plainString = "foo"
Encoding
let plainData = plainString.data(using: .utf8)
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Specifying Maven's local repository location as a CLI parameter
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Array slices in C#
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Note using Array.Copy performs a lot faster than using LINQ's Take or Skip methods.
– Michael
Jun 23 ...
How to enable Ad Hoc Distributed Queries
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edited Jan 27 '13 at 4:16
Aaron Bertrand
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C++ include and import difference
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Head GeekHead Geek
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promise already under evaluation: recursive default argument reference or earlier problems?
...instances where they occur we get:
f <- function(x, T) {
10 * sin(0.3 * x) * sin(1.3 * x^2) + 0.001 * x^3 + 0.2 * x + 80
}
g <- function(x, T, f. = f) { ## 1. note f.
exp(-f.(x)/T)
}
test<- function(g. = g, T = 1) { ## 2. note g.
g.(1,T)
}
test()
## [1] 8.560335e-37
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CSS Selector that applies to elements with two classes
...attribute being set to two specific classes. For example, let's say I have 3 divs:
1 Answer
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c# datatable insert column at position 0
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How would I get a cron job to run every 30 minutes?
I'm looking to add a crontab entry to execute a script every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0.
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