arsentieva/insertion-sort

Insertion Sort

This project contains a skeleton for you to implement Insertion Sort. In the file lib/insertion_sort.js, you should implement the Insertion Sort.

The algorithm can be summarized as the following:

1. If it is the first element, it is already sorted. return 1;
2. Pick next element
3. Compare with all elements in the sorted sub-list
4. Shift all the elements in the sorted sub-list that is greater than the value to be sorted
5. Insert the value
6. Repeat until list is sorted

This is a description of how the Insertion Sort works (and is also in the code file).

procedure insertionSort( A : array of items )
   int holePosition
   int valueToInsert

   for i = 1 to length(A) inclusive do:

      /* select value to be inserted */
      valueToInsert = A[i]
      holePosition = i

      /*locate hole position for the element to be inserted */

      while holePosition > 0 and A[holePosition-1] > valueToInsert do:
         A[holePosition] = A[holePosition-1]
         holePosition = holePosition -1
      end while

      /* insert the number at hole position */
      A[holePosition] = valueToInsert

   end for

end procedure

• Clone the project from https://github.com/appacademy-starters/algorithms-insertion-sort-starter.
• cd into the project folder
• npm install to install dependencies in the project root directory
• npm test to run the specs
• You can view the test cases in /test/test.js. Your job is to write code in the /lib/insertion_sort.js that implements the Insertion Sort.