USycc4uT

1
2#
3# fold
4
5def sum_nums(lst):
6    sum = 0
7    for el in lst:
8        sum = sum + el
9    return sum
10
11def sum_strs(lst):
12    sum = ""
13    for el in lst:
14        sum = sum + el
15    return sum
16
17print(sum_nums([1, 2, 3]))
18print(sum_strs(["A", "B", "C"]))
19
20init = 0
21
22def f(a, b):
23    return a + b
24
25def fold(lst):
26    acc = init
27    for el in lst:
28        acc = f(acc, el)
29    return acc
30
31
32print(fold([1, 2, 3]))
33
34def ave_grade(lst):
35    acc = 0
36    for el in lst:
37        acc = f(acc, el)
38    return acc / len(lst)
39
40
41print(ave_grade([80, 92, 65, 72])) # 77.25
42
43# [fold] Create a function that finds the minimum of a list of numbers
44
45def min_of_2(a, b):
46    if (a < b):
47        return a
48    else:
49        return b
50
51def min_num(lst):
52    acc = lst[0]
53    for el in lst:
54        acc = min_of_2(acc, el)
55    return acc
56
57print(min_num([80, 92, 65, 72])) # 65
58print(min_num(["A", "B", "C"])) # "A"
59
60
61# fold] Create a function that counts the number of vowels in a string
62
63def to_lower(ch):
64    return ch.lower()
65
66def is_vowel(upper_ch):
67    ch = to_lower(upper_ch)
68    return ch == "a" or ch == "e" or ch == "i" or ch == "o" or ch == "u"
69
70
71def count_vowel(count, ch):
72    if (is_vowel(ch)):
73        return count + 1
74    else:
75        return count
76
77def num_vowels(lst):
78    count = 0
79    for el in lst:
80        count = count_vowel(count, el)
81    return count
82
83print(num_vowels("Jheno Astillero Mollejon")) # 9
84
85# create a function that counts the number of gmail.com email addresses in a list
86def count_gmail(count, email):
87    if (email[-10:] == "@gmail.com"):
88        return count + 1
89    else:
90        return count
91
92def num_gmail(lst):
93    count = 0
94    for email in lst:
95        count = count_gmail(count, email)
96    return count
97
98print(num_gmail([ "abc@yahoo.com", "hij@gmail.com", "klj@gmail.com" ]))
99
100# Determine whether every name in the list begins with J
101
102def begins_with_j(acc, el):
103    return acc and (el[0] == 'j' or el[0] == 'J')
104
105    # if (acc == False):
106    #     return False
107    # elif (el[0] == 'j' or el[0] == 'J'):
108    #     return True
109    # else:
110    #     return False
111
112def all_begins_with_j(lst):
113    acc = True
114    for el in lst:
115        acc = begins_with_j(acc, el)
116    return acc
117
118print(all_begins_with_j(["jheno", "joshua", "janice"]))
119print(all_begins_with_j(["jheno", "nisha", "janice"]))