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Google Coding Interview
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| #!/usr/bin/env python3 | |
| # Google Former Coding Interview | |
| # https://techdevguide.withgoogle.com/resources/former-coding-interview-question-word-squares/ | |
| from itertools import product | |
| import re | |
| import sys | |
| def has_word_square(words_list): | |
| # each j-th character in the i-th word | |
| # must match the i-th character in the j-th word | |
| for i, word in enumerate(words_list): | |
| for j, char in enumerate(word): | |
| j_word_char = words_list[j][i] | |
| if j_word_char != char: | |
| return False | |
| return True | |
| def has_any_word_square(words_list): | |
| # words must have the same lengths | |
| all_words_have_same_length = all(map(lambda l: l == len(words_list[0]), map(len, words_list))) | |
| if not all_words_have_same_length: | |
| return False | |
| total_lists = 0 | |
| for perm in product(words_list, repeat=len(words_list[0])): | |
| total_lists += 1 | |
| if has_word_square(perm): | |
| return True | |
| print('I have created and analyzed', total_lists, 'words list') | |
| return False | |
| def find_word_squares(words_list): | |
| total_lists = 0 | |
| word_squares = [] | |
| for perm in product(words_list, repeat=len(words_list[0])): | |
| total_lists += 1 | |
| if has_word_square(perm): | |
| word_squares.append(tuple(perm)) | |
| print('I have created and analyzed', total_lists, 'words list') | |
| return word_squares | |
| def read_words(iterable, spaces_regex): | |
| return [re.sub(spaces_regex, ' ', line.strip()) for line in iterable] | |
| if __name__ == '__main__': | |
| words = [] | |
| if len(sys.argv) > 1 and sys.argv[1] == '-i': | |
| spaces_regex = re.compile('( ?)+') | |
| words = read_words(sys.stdin.readlines(), spaces_regex) | |
| else: | |
| words = ['AREA', 'BALL', 'DEAR', 'LADY', 'LEAD', 'YARD'] | |
| if len(words) == 0: | |
| sys.exit(1) | |
| squares = find_word_squares(words) | |
| print(squares) | |
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