The challenge
Write a hashtag generator function that takes a string and returns a #HashCodeString of it.
The hashtag generator should perform the following tasks.
Follow these rules:
- It must start with a hashtag (
#). - All words must have their first letter capitalized.
- If the final result is longer than 140 chars it must return
false. - If the input or the result is an empty string it must return
false.
Examples:
" Hello World " => "#HelloWorld"
"" => false
The solution in Python code
Option 1:
def generate_hashtag(s):
output = "#"
for word in s.split():
output += word.capitalize()
return False if (len(s) == 0 or len(output) > 140) else output
Option 2:
def generate_hashtag(s):
ans = '#'+ str(s.title().replace(' ',''))
return s and not len(ans)>140 and ans or False
Option 3:
generate_hashtag=lambda d:(lambda b:d>''<b==b[:139]and'#'+b)(d.title().replace(' ',''))
Test cases to validate our solution
test.describe("Basic tests")
test.assert_equals(generate_hashtag(''), False, 'Expected an empty string to return False')
test.assert_equals(generate_hashtag('Do We have A Hashtag')[0], '#', 'Expeted a Hashtag (#) at the beginning.')
test.assert_equals(generate_hashtag('c i n'), '#CIN', 'Should capitalize first letters of words even when single letters.')
test.assert_equals(generate_hashtag('this is nice'), '#ThisIsNice', 'Should deal with unnecessary middle spaces.')
test.assert_equals(generate_hashtag('Looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong Cat'), False, 'Should return False if the final word is longer than 140 chars.')
