import list_lib as ll
# Treating strings as lists and using for loops. Factor out of the list
# words every string that begins with the letter 'a' or the letter 't'.
words = [
"The", "happy", "student", "did", "their", "homework", "and", "ate", "an",
"apple"
]
result = []
skips = ['T', 't', 'a', 'A']
for word in words:
first_char = ll.head(word)
if not (first_char in skips):
result = ll.cons(word, result)
result = ll.reverse(result)
# Define resolve the problem using a list comprehension, and store your result in
# result2.
result2 = [word for word in words if not (ll.head(word) in skips)]
import list_lib as ll
# Write the following list comprehension using an explicit for-loop:
#
# squares = [x**2 for x in range(0,43)]
#
# Then write a for-loop to print the list out to the screen in list format.
squares = []
for x in range(0,43):
squares = ll.cons(x**2,squares)
squares = ll.reverse(squares)
output = "["
for x in range(0,ll.length(squares) - 1):
next_element = str(ll.head(squares))
squares = ll.tail(squares)
output = output + next_element + ", "
last_element = str(ll.head(squares))
output = output + last_element + "]"
print(output)
import list_lib as ll
# Using for-loops and given a blank 10 x 10 board called board.
# Mark every other cell with a X. Then print the board out in
# for format of a game board.
board = [[(r, c, '-') for c in range(0, 10)] for r in range(0, 10)]
new_board = []
for row in board:
new_row = []
for (r, c, d) in row:
if c % 2 == 0:
new_row = ll.cons((r, c, "X"), new_row)
else:
new_row = ll.cons((r, c, d), new_row)
new_row = ll.reverse(new_row)
new_board = ll.cons(new_row, new_board)
new_board = ll.reverse(new_board)
output = " "
row_i = 0
for col_i in range(0, 10):
output = output + " " + str(col_i)
output = output + "\n"
for row in new_board:
if row_i < 10:
output = output + " " + str(row_i) + "|"
else:
output = output + str(row_i) + "|"
for (r, c, d) in row:
import list_lib as ll
# Treating strings as lists and using for loops. Factor out of the list
# words every string that begins with the letter 'a' or 'A' or the letter 't' or 'T'.
words = [
"The", "happy", "student", "did", "their", "homework", "and", "ate", "an",
"apple"
]
skips = ['a', 'A', 't', 'T']
found_words = []
for word in words:
first_char = ll.head(word)
if not (first_char in skips):
found_words = ll.cons(word, found_words)
found_words = ll.reverse(found_words)
# Define resolve the problem using a list comprehension, and store your result in
# found_words2.
found_words2 = [word for word in words if not (ll.head(word) in skips)]