Update graph alogorithms

Author: sudheerj

README.md

@@ -11,7 +11,6 @@ List of Programs related to data structures and algorithms
 ### Queue
    1. Queue using array: [JavaScript](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/queue/queue_array.js)
    2. Queue using linkedlist: [JavaScript](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/queue/queue_with_linkedlist.js)
-   3. Queue using stack: [JavaScript]()
 
 ### SinglyLinkedlist
    1. SinglyLinkedlist implementation: [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/singlyLinkedList/singlyLinkedList.js) [Playground](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/singlyLinkedList/singlyLinkedList.js) [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/singlyLinkedList/singlyLinkedList.md)
@@ -21,11 +20,11 @@ List of Programs related to data structures and algorithms
    1. DoublyLinkedlist implementation: [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/doublyLinkedlist/doublyLinkedlist.js) [Playground](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/doublyLinkedlist/doublyLinkedlist.js) [Documentation](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/doublyLinkedlist/doublyLinkedlist.md)
 
 ### Tree
-   1. Binary Search Tree: [JavaScript](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/trees/binary_search_tree.js)
+   1. Binary Search Tree: [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/trees/binary_search_tree.js) [JavaScript](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/trees/binary_search_tree.js) [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/trees/binary_search_tree.js)
 
 ### Graphs
 
-   1. Unweighted undirected graph: [JavaScript](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/graphs/unweighted_undirected.js)
+   1. Unweighted undirected graph: [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/graphs/unweightedUndirected/unweighted_undirected.js) [Playground](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/graphs/unweightedUndirected/unweighted_undirected.js) [Documentation](https://livecodes.io/?console=open&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/datastructures/graphs/unweightedUndirected/unweighted_undirected.md)
 
 ### HashTable
 
@@ -155,21 +154,16 @@ List of Programs related to data structures and algorithms
 
 ### Graph
 
-   1. Clone graph: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/cloneGraph.js)
 
-   2. Course schedule: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/courseSchedule.js)
-
-   3. Pacific Atlantic waterflow: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/pacificAtlantic.js)
-
-   4. Number of Islands: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/numberOfIslands.js)
-
-   5. Longest consecutive sequence: [JavaScript](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/longestConsecutiveSequence.js)
-
-   6. Alien dictionary: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/alienDictionary.js)
-
-   7. Graph valid tree: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/graphValidTree.js)
-
-   8. Number of connected components in an undirected graph: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/numberOfConnectedComponents.js)
+| No. | Name                       |                                                                                      Source                                                                                      | Live                                                                                                                                                                                 |                                                                                      Documentation                                                                                      | Level  |              Pattern              |
+| :-: | :------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :----: | :-------------------------------: |
+|  1  | Clone graph                |                      [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/1.cloneGraph/cloneGraph.js)                      | [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/1.cloneGraph/cloneGraph.js)           |                      [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/1.cloneGraph/cloneGraph.js)                      | Medium | Depth-First-Search(DFS) using recursion |
+|  2  | Course schedule            |                  [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/2.courseSchedule/courseSchedule.js)                  | [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/2.courseSchedule/courseSchedule.js)   |                  [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/2.courseSchedule/courseSchedule.md)                  | Medium |    DFS using recursion                               |
+|  3  | Pacific Atlantic waterflow | [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/3.pacificAtlantic/pacificAtlantic.js) | [Playground](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/3.pacificAtlantic/pacificAtlantic.js) | [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/3.pacificAtlantic/pacificAtlantic.md) | Medium       |    DFS using recursion                               |
+|  4  | Number of Islands          | [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/4.numberOfIslands/numberOfIslands.js) | [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/4.numberOfIslands/numberOfIslands.js) | [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/4.numberOfIslands/numberOfIslands.md) |Medium       |    DFS using recursion                               |
+|  5  | Alien dictionary         | [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/5.alienDictionary/alienDictionary.js) | [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/5.alienDictionary/alienDictionary.js) | [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/5.alienDictionary/alienDictionary.md) |Hard       |    Kahn's algorithm for topological sorting                               |
+|  6  |  Graph valid tree         | [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/6.graphValidTree/graphValidTree.js) | [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/6.graphValidTree/graphValidTree.js) | [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/6.graphValidTree/graphValidTree.md) | Medium       |    Union Find algorithm(+ union by rank & path compression)                               |
+|  7  | Number of connected components in an undirected graph         | [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/7.numberOfConnectedComponents/numberOfConnectedComponents.js) | [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/7.numberOfConnectedComponents/numberOfConnectedComponents.js) | [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/graph/7.numberOfConnectedComponents/numberOfConnectedComponents.md) | Medium       |    Union Find algorithm(+ union by rank & path compression)                               |
 
 ### Matrix
 
@@ -193,6 +187,11 @@ List of Programs related to data structures and algorithms
 
 ### Hashtable
 
+<!--| No. | Name                       |                                                                                      Source                                                                                      | Live                                                                                                                                                                                 |                                                                                      Documentation                                                                                      | Level  |              Pattern              | 
+
+| 6 |  Longest consecutive sequence                          |  [Source](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/hashtable/6.longestConsecutiveSequence/longestConsecutiveSequence.js)                                                                                                                                                                                | [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/hashtable/6.longestConsecutiveSequence/longestConsecutiveSequence.js)                                                                                                                                                                                     | [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/hashtable/6.longestConsecutiveSequence/longestConsecutiveSequence.md)                                                                                                                                                                                        |        |                                   |
+-->
+
    1. Duplicates: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/hashtable/duplicates.js)
 
    2. Two sum: [JavaScript](https://livecodes.io/?console&x=https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/hashtable/twoSum/twoSum.js) [Documentation](https://github.com/sudheerj/datastructures-algorithms/blob/master/src/javascript/algorithms/hashtable/twoSum/twoSum.md)