Question

Write a python program that takes two arrays a and b and prints the dot product.

Example::

• Array a with ['apple' , 'banana' , 'carrot', ‘turtle’, ‘zebra’]
• Array b with ['red', 'blue', 'green']
• A * B generates [ ['apple', 'red'] , ['apple' , 'blue'] , ['apple' , 'green'] , ['banana', 'red'], ...]

1. Put dot product in method with 2 arrays as parameters.
2. Make sure works with and empty list for A or B or both.
3. Make sure works for above test case.

Answer 1

Code:

def dotProduct(arr1,arr2): # dotproduct function
    if arr1==[]:            #condition for arr1 is empty
        return arr2
    elif arr2 == []:        #condition for arr2 is empty
        return arr1
    elif arr1 ==[] and arr2 ==[]:   #condition for arr1,arr2 are empty
        return []
    else:
        list = [[x,y] for x in arr1 for y in arr2] #dot product of arrays.
    return list     #return from fuction.

a = ['apple' , 'banana' , 'carrot', 'turtle', 'zebra']
b = ['red', 'blue', 'green']
emp1 = []
emp2 = []

print(dotProduct(a,b))       #fucntion call with arrays
print(dotProduct(a,emp2))    #fucntion call with one empty array
print(dotProduct(emp1,b))
print(dotProduct(emp1,emp2)) #fucntion call with both empty array

Code Image:

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