Pluralising English
English is known for some oddities, and one of them is the rules for pluralisation.
Generally, a noun is made plural by adding an "s" on the end of the word, but for words ending in "s", "x" or "ch", the word is pluralised by adding an "es"
English also has some strange words that are spelled the same in the singular and the plural, like "moose" or "deer".
Some words have multiple plurals, like "octupus"
Since this is meant to be a simple challenge, we will ignore words with identical spellings and words like "octopus" will get a regular plural.
Sometime in the future, I might make a more complex challenge with all these irregularities included.
The kata
You will receive a string containing one or more space-separated words. Pluralise each word in the string and return it as a space-separated string.
Examples
---------------
cat --> cats
peach --> peaches
queen king --> queens kings
def pluralise(strng):
if strng == "":
return ""
result = []
for i in strng.split(" "):
match i[len(i) - 1]:
case "s":
result.append(i + "es")
case "x":
result.append(i + "es")
case "h":
if i[len(i) - 2:] == "ch":
result.append(i + "es")
else:
result.append(i + "s")
case _:
result.append(i + "s")
return " ".join(result)import codewars_test as test
# TODO Write tests
import solution # or from solution import example
# test.assert_equals(actual, expected, [optional] message)
@test.describe("Test Suite")
def test_group():
@test.it("single word tests")
def test_case():
test.assert_equals(pluralise("cat"), "cats")
test.assert_equals(pluralise("box"), "boxes")
test.assert_equals(pluralise("kiss"), "kisses")
test.assert_equals(pluralise("octopus"), "octopuses")
test.assert_equals(pluralise("beach"), "beaches")
test.assert_equals(pluralise("moth"), "moths")
test.assert_equals(pluralise(""), "")
@test.it("multiple word tests")
def test_case():
test.assert_equals(pluralise("queen king"), "queens kings")
test.assert_equals(pluralise("cat beach peach tree diamond"), "cats beaches peaches trees diamonds")
test.assert_equals(pluralise("ace fight enter power"), "aces fights enters powers")
test.assert_equals(pluralise("cactus juice princess war"), "cactuses juices princesses wars")class OrdinalNumbers: def __init__(self, n): self.n = n def solution(self): ht = {1: 'st', 2: 'nd', 3: 'rd'} last_digit = self.n % 10 if self.n % 100 in [11, 12, 13] or last_digit not in [1,2,3]: return str(self.n) + 'th' elif last_digit in [1,2,3]: return str(self.n) + ht[last_digit]- class OrdinalNumbers:
- def __init__(self, n):
- self.n = n
- def solution(self):
- ht = {1: 'st', 2: 'nd', 3: 'rd'}
if len(str(self.n)) < 2 or self.n in [11, 12, 13]:suffix = ht.get(self.n, 'th')return f'{self.n}{suffix}'else:last_digit = self.n % 10suffix = ht.get(last_digit, 'th')return f'{self.n}{suffix}'- last_digit = self.n % 10
- if self.n % 100 in [11, 12, 13] or last_digit not in [1,2,3]:
- return str(self.n) + 'th'
- elif last_digit in [1,2,3]:
- return str(self.n) + ht[last_digit]