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Best way to merge two maps and sum the values of same key?
...trait
trait Monoid[M] {
def zero: M
def op(a: M, b: M): M
}
The Map based implementation of the Monoid trait that merges two maps.
val mapMonoid = new Monoid[Map[Int, Int]] {
override def zero: Map[Int, Int] = Map()
override def op(a: Map[Int, Int], b: Map[Int, Int]): Map[Int, Int] =
...
How do I render a partial of a different format in Rails?
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64
What's wrong with
render :partial => '/foo/baz.html.erb'
? I just tried this to render a...
What does “while True” mean in Python?
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Dagg NabbitDagg Nabbit
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Is R's apply family more than syntactic sugar?
...an be substantial, like when you have to nest for-loops to get the average based on a grouping of more than one factor. Here you have two approaches that give you the exact same result :
set.seed(1) #for reproducability of the results
# The data
X <- rnorm(100000)
Y <- as.factor(sample(lett...
SQL- Ignore case while searching for a string
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Difference between dispatch_async and dispatch_sync on serial queue?
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How to git commit a single file/directory
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Lily BallardLily Ballard
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How do I declare an array of weak references in Swift?
... }
}
As gokeji mentioned, I figured out NSString won't get deallocated based on the code in usage.
I scratched my head and I wrote MyString class as follows.
// typealias MyString = NSString
class MyString: CustomStringConvertible {
var string: String
init(string: String) {
self...
'console' is undefined error for Internet Explorer
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64
Damn... you build a nice website, developing it for your favorite browser. At the end you spend 4-5 HOURS making it compatible with all oth...
Do Google refresh tokens expire?
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Jonathan Leffler
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answered Jan 21 '12 at 15:21
ShadowS...