Remove duplicate from sorted array - facebook code lab - pass all test cases.

removeDuplicatesFromSortedArray1.java

public class Solution {
	public int removeDuplicates(List<Integer> a) {
	    if(a==null || a.size() == 0) 
	        return 0; 
	  
	    int prev = Integer.valueOf(a.get(0)); 
	    int index = 0; 
	    int count = 0; 
	    for(int i=1; i< a.size(); i++)
	    {
	        int curr = Integer.valueOf(a.get(i)); 
	        if(curr != prev)
	        {
	            count++;
	            a.set(count, curr);   // set array new value 
	            prev = curr; 
	             
	        }
	    }
	    
	    return count +1; 
	}
}