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one more exercise

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src
- main/scala/org/codecraftlabs/leetcode
  - SubDomainVisitCount.scala
- test/scala/org/codecraftlabs/leetcode
  - SubDomainVisitCountSpec.scala

+37

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	`1`	`+package org.codecraftlabs.leetcode`
	`2`	`+`
	`3`	`+import scala.collection.mutable`
	`4`	`+`
	`5`	`+object SubDomainVisitCount {`
	`6`	`+ def subDomainVisits(domains: Array[String]): List[String] = {`
	`7`	`+ val mappings = mutable.Map[String, Long]()`
	`8`	`+ domains.foreach(i => splitDomains(i, mappings))`
	`9`	`+ mappings.map(i => i._2.toString + " " + i._1).toList`
	`10`	`+ }`
	`11`	`+`
	`12`	`+ private def splitDomains(domain: String, mapping: mutable.Map[String, Long]): Unit = {`
	`13`	`+ val items = domain.split(" ").map(_.trim)`
	`14`	`+ val counter = items(0).toLong`
	`15`	`+ val url = items(1)`
	`16`	`+`
	`17`	`+ val urlPieces = url.split("\\.").map(_.trim).reverse`
	`18`	`+ var buffer: String = ""`
	`19`	`+ urlPieces.foreach(item => {`
	`20`	`+ val temp = item + "."`
	`21`	`+ buffer = temp + buffer`
	`22`	`+ val currentValue: Long = mapping.getOrElse(buffer.toString().stripPrefix("."), 0)`
	`23`	`+ val total = currentValue + counter`
	`24`	`+ mapping.put(buffer.toString().stripPrefix("."), total)`
	`25`	`+ })`
	`26`	`+ }`
	`27`	`+}`

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	`1`	`+package org.codecraftlabs.leetcode`
	`2`	`+`
	`3`	`+import org.scalatest.{FlatSpec, Matchers}`
	`4`	`+`
	`5`	`+class SubDomainVisitCountSpec extends FlatSpec with Matchers {`
	`6`	`+ "Test case 001" should "return true" in {`
	`7`	`+ val items = Array("500 test.com")`
	`8`	`+ val result = SubDomainVisitCount.subDomainVisits(items)`
	`9`	`+ }`
	`10`	`+}`

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