Merge branch 'master' of github.com:andersonkmi/leetcode-scala

Author: andersonkmi

.travis.yml

@@ -1,6 +1,6 @@
 language: scala
 scala:
-    - 2.12.5
+    - 2.13.0
 jdk:
     - oraclejdk8
 dist: trusty

project/build.properties

@@ -1 +1 @@
-sbt.version=1.2.8
+sbt.version=1.2.8

src/main/scala/org/codecraftlabs/leetcode/AddBinary.scala

@@ -29,7 +29,7 @@ object AddBinary {
   }
 
   private def binary2Decimal(value: String): BigInt = {
-    val elements = value.map(item => item.toString.toInt).toList.reverse
+    val elements = value.toCharArray.map(item => item.toString.toInt).toList.reverse
     bin2Dec(elements, 0, 0)
   }
 

src/main/scala/org/codecraftlabs/leetcode/BinaryTreeLevelTraversal.scala

@@ -7,7 +7,7 @@ object BinaryTreeLevelTraversal {
   def levelOrder(root: TreeNode): List[List[Int]] = {
     val resultingMap = mutable.LinkedHashMap[Int, ListBuffer[Int]]()
     preOrderTraversal(root, 0, resultingMap)
-    val finalResult = resultingMap.map(item => item._2.toList)
+    val finalResult = resultingMap.toArray.map(item => item._2.toList)
     finalResult.toList
   }
 

src/main/scala/org/codecraftlabs/leetcode/BinaryTreeLevelTraversalII.scala

@@ -7,7 +7,7 @@ object BinaryTreeLevelTraversalII {
   def levelOrderBottom(root: TreeNode): List[List[Int]] = {
     val resultingMap = mutable.LinkedHashMap[Int, ListBuffer[Int]]()
     preOrderTraversal(root, 0, resultingMap)
-    val finalResult = resultingMap.map(item => item._2.toList)
+    val finalResult = resultingMap.toArray.map(item => item._2.toList)
     finalResult.toList.reverse
   }
 

src/main/scala/org/codecraftlabs/leetcode/PlusOne.scala

@@ -14,6 +14,6 @@ object PlusOne {
 
   private def decomposeNumber(number: BigInt): Array[Int] = {
     val strRep = number.toString
-    strRep.map(item => item.asDigit).toArray[Int]
+    strRep.toCharArray.map(item => item.asDigit)
   }
 }

src/main/scala/org/codecraftlabs/leetcode/ReverseLinkedList.scala

@@ -7,14 +7,14 @@ object ReverseLinkedList {
     if (head == null) {
       head
     } else {
-      val nodeStack = mutable.ArrayStack[ListNode]()
+      val nodeStack = mutable.Stack[ListNode]()
       process(head, nodeStack)
       nodeStack.head
     }
 
   }
 
-  private def process(node: ListNode, nodeStack: mutable.ArrayStack[ListNode]): Unit = {
+  private def process(node: ListNode, nodeStack: mutable.Stack[ListNode]): Unit = {
     if (node != null) {
       val item = node.next
 

src/main/scala/org/codecraftlabs/leetcode/SingleNumber.scala

@@ -2,6 +2,6 @@ package org.codecraftlabs.leetcode
 
 object SingleNumber {
   def singleNumber(nums: Array[Int]): Int = {
-    nums.groupBy(l => l).mapValues(_.length).filter(p => p._2 == 1).keys.head
+    nums.groupBy(l => l).view.mapValues(_.length).filter(p => p._2 == 1).keys.head
   }
 }

src/main/scala/org/codecraftlabs/leetcode/SingleNumberII.scala

@@ -2,6 +2,6 @@ package org.codecraftlabs.leetcode
 
 object SingleNumberII {
   def singleNumber(nums: Array[Int]): Int = {
-    nums.groupBy(l => l).mapValues(_.length).filter(p => p._2 == 1).keys.head
+    nums.groupBy(l => l).view.mapValues(_.length).filter(p => p._2 == 1).keys.head
   }
 }

src/main/scala/org/codecraftlabs/leetcode/SingleNumberIII.scala

@@ -2,6 +2,6 @@ package org.codecraftlabs.leetcode
 
 object SingleNumberIII {
   def singleNumber(nums: Array[Int]): Array[Int] = {
-    nums.groupBy(l => l).mapValues(_.length).filter(p => p._2 == 1).keys.toArray
+    nums.groupBy(l => l).view.mapValues(_.length).filter(p => p._2 == 1).keys.toArray
   }
 }

src/main/scala/org/codecraftlabs/leetcode/ValidPalindrome.scala

@@ -16,7 +16,7 @@ object ValidPalindrome {
 
   private def keepCharsOnly(sentence: String): String = {
     val ordinary=(('a' to 'z') ++ ('0' to '9')).toSet
-    sentence.map(item => {
+    sentence.toCharArray.map(item => {
       if(ordinary.contains(item)) item else ""
     }).mkString
   }

src/main/scala/org/codecraftlabs/utils/NumberConverter.scala

@@ -20,7 +20,7 @@ object NumberConverter {
   }
 
   def binary2Decimal(value: String): Long = {
-    val elements = value.map(item => item.toString.toInt).reverse.toList
+    val elements = value.toCharArray.map(item => item.toString.toInt).reverse.toList
     bin2Dec(elements, 0, 0)
   }