longestCommonPrefix

class Solution:
    def longestCommonPrefix(self, myArr):
        prefix = myArr[0]
       
        
        if myArr == "":
            return 
        i = 0
        # here we have to get a loop for the strings
        # and then within the strings I have to iterate 
        # through them. Difficult to do it in one loop
        # so you need to setup a for loop and within it, 
        # set up a while loop
        for i in myArr[1:]:
            print(i)
            while not i.startswith(prefix):
                    print(i)
                    print(i.startswith(prefix))
                    print(prefix)
                    # I did -1 instead of :-1 meaning
                    # take out the last char of prefix
                    prefix = prefix[:-1]
        return prefix        
                    
                    
            
            
        #res = [sub[: -1] for sub in test_list]    
           #my_str = my_str[:-1] 
            
myVar = Solution()
myVar.longestCommonPrefix(["flower","flow","flight"])