Daily Coding Challenge - Spam Detector

Curriculum Help
1

Tell us what’s happening:

“The number has the same digit four or more times in a row (ignoring the formatting characters).” this condition doesnt work unless i decrease it to 3 times.

Your code so far

def is_spam(number):
    parts = number.split()
    if not parts:
        return False

    country_code = parts[0][1:]  # strip leading '+'
    area_code = parts[1].strip("()")
    prefix, line = parts[2].split("-")

    # Rule 1: country code more than 2 digits or doesn't start with 0
    if len(country_code) > 2 or country_code[0] != '0':
        return True

    # Rule 2: area code outside 200-900
    if not (200 <= int(area_code) <= 900):
        return True

    # Rule 3: 4+ consecutive identical digits anywhere in the full number
    full = country_code + area_code + prefix + line
    consecutive = 0
    for i in range(1, len(full)):
        if full[i] == full[i - 1]:
            consecutive += 1
            if consecutive >= 3:
                return True
        else:
            consecutive = 0

    # Rule 4: every unique digit from country code appears in every other part
    for d in set(country_code):
        if not all(d in part for part in [area_code, prefix, line]):
            break
    else:
        # All digits matched — this is the "all True" path
        return True

    # Rule 5: sum of prefix digits appears in line number
    prefix_sum = sum(int(d) for d in prefix)
    if str(prefix_sum) in line:
        return True

    return False

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Challenge Information:

Daily Coding Challenge - Spam Detector
https://www.freecodecamp.org/learn/daily-coding-challenge/09-27
GitHub Link: freeCodeCamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/68b7687dded630607aceccb1.md at main · freeCodeCamp/freeCodeCamp · GitHub

2

in this loop, consecutive has += 1 for the first time when the second consecutive digit is found, because that’s when full[i] == full[i - 1] is True for the first time

consider 05555641987

when i is 1, full[i] is 5 but full[i - 1] is 0, so the comparison is False

only when i is 2 then the comparison is True