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Challenge 29: Acronym Builder

curriculum/challenges/english/blocks/daily-coding-challenges-python/68adce01c0e1144d0a90295e.md

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--description--

Given a string containing one or more words, return an acronym of the words using the following constraints:

  • The acronym should consist of the first letter of each word capitalized, unless otherwise noted.
  • The acronym should ignore the first letter of these words unless they are the first word of the given string: a, for, an, and, by, and of.
  • The acronym letters should be returned in the order they are given.
  • The acronym should not contain any spaces.

--hints--

build_acronym("Search Engine Optimization") should return "SEO".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(build_acronym("Search Engine Optimization"), "SEO")`)
}})

build_acronym("Frequently Asked Questions") should return "FAQ".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(build_acronym("Frequently Asked Questions"), "FAQ")`)
}})

build_acronym("National Aeronautics and Space Administration") should return "NASA".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(build_acronym("National Aeronautics and Space Administration"), "NASA")`)
}})

build_acronym("Federal Bureau of Investigation") should return "FBI".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(build_acronym("Federal Bureau of Investigation"), "FBI")`)
}})

build_acronym("For your information") should return "FYI".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(build_acronym("For your information"), "FYI")`)
}})

build_acronym("By the way") should return "BTW".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(build_acronym("By the way"), "BTW")`)
}})

build_acronym("An unstoppable herd of waddling penguins overtakes the icy mountains and sings happily") should return "AUHWPOTIMSH".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(build_acronym("An unstoppable herd of waddling penguins overtakes the icy mountains and sings happily"), "AUHWPOTIMSH")`)
}})

--seed--

--seed-contents--

py
def build_acronym(s):

    return s

--solutions--

py
def build_acronym(s):
    small_words = {"a", "for", "an", "and", "by", "of"}
    words = s.split()
    acronym = ""

    for i, word in enumerate(words):
        if i == 0 or word.lower() not in small_words:
            acronym += word[0].upper()

    return acronym