6. Write a function to validate an email. Below is the html element we're validating. The validation should check for: • Is there an '@' symbol in the email • Does the email have one of these hosts(For this purpose, assume there are no other email hosts that are valid)? 'gmail.com', 'outlook.com', or 'yahoo.com'

6. Write a function to validate an email. Below is the html element we're validating. The validation should check for: • Is there an '@' symbol in the email • Does the email have one of these hosts(For this purpose, assume there are no other email hosts that are valid)? 'gmail.com', 'outlook.com', or 'yahoo.com'

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter9: Records (struct)

Section: Chapter Questions

Problem 16SA

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"""3. Write a function validSolution/ValidateSolution/valid_solution()that accepts a 2D array representing a Sudoku board, and returns trueif it is a valid solution, or false otherwise. The cells of the sudokuboard may also contain 0's, which will represent empty cells.Boards containing one or more zeroes are considered to be invalid solutions.The board is always 9 cells by 9 cells, and every cell only contains integersfrom 0 to 9. (More info at: http://en.wikipedia.org/wiki/Sudoku)""" # Using dict/hash-tablefrom collections import defaultdict def valid_solution_hashtable(board): for i in range(len(board)): dict_row = defaultdict(int) dict_col = defaultdict(int) for j in range(len(board[0])): value_row = board[i][j] value_col = board[j][i] if not value_row or value_col == 0: return False if value_row in dict_row: return False else: dict_row[value_row] += 1.
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