Recipe 252177 revision 3

def getcommonletters(strlist):
    return ''.join([x[0] for x in zip(*strlist) \
                     if reduce(lambda a,b:(a == b) and a or None,x)])

def findcommonstart(strlist):
    strlist = strlist[:]
    prev = None
    while True:
        common = getcommonletters(strlist)
        if common == prev:
            break
        strlist.append(common)
        prev = common

    return getcommonletters(strlist)

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History

• revision 3 (20 years ago)
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