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Vlad Patryshev vpatryshev

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vpatryshev / HtmlPropsExtraction.scala
Last active Dec 21, 2015
sample code for html data extraction
View HtmlPropsExtraction.scala
// we already have a bunch of patient properties on one tab (in props1); now get another bunch from another tab
// we click it and wait for the element to show up; then:
val props2 = extractProperties("div#ctl00_ContentPlaceHolder1_Details_Container2") map (_.trimPrefixes)
// trimming prefixes means we do not care about all the additional keys, but just a variety of values
// now let's blend the two sets together; <*> will produce either Good((p1,p2)) or Bad(errors1 ++ errors2)
val propsOpt: Result[(Props, Props)] = props1 <*> props2
// then we want to merge together two sets of patient properties; that's what we do in map
val patientData = propsOpt map ((xy:(Props, Props)) => (xy._1 ++ xy._2))
debug(s"Got patient data\n $patientData")
vpatryshev / ArrayListToFunctor
Last active Dec 14, 2015
an example how java.util.ArrayList can be turned into a functor and get a functor's map() method.
View ArrayListToFunctor
* This trait (typeclass) defines one operation for a parametrized type F
* the operation is known as fmap in Haskell, f1 in internal categories.
* For each pair of arbitrary types X, Y and an arbitrary function:X=>Y,
* it should provide a function F[X]=>F[Y].
* Providing means that the implementation depends on a specific type F
* E.g. given F = List, and a function f(n: Int): String = "{{" + n + "}}",
* we should have a function List[Int]=>List[String] that wraps elements in double braces.
vpatryshev / RE.scala
Created Sep 24, 2012
regexp from Beautiful Code, in tongues
View RE.scala
case class Ch(c: Char) { def ~=(x: Char) = c == '.' || c == x }
class RE(val regexp: String) {
def skip(n: Int) = RE(regexp.substring(n))
implicit def token(c: Char) = Ch(c)
def c0 = Ch(regexp(0))
def c1 = regexp(1)
def ~=(text: String): Boolean = {