Skip to content

Find the Maximum Length Difference between Lists/Arrays in Python

The challenge

You are given two arrays a1 and a2 of strings. Each string is composed of letters from a to z. Let x be any string in the first array and y be any string in the second array.

Find max(abs(length(x) − length(y)))

If a1 and/or a2 are empty return -1 in each language except in Haskell (F#) where you will return Nothing (None).


a1 = ["hoqq", "bbllkw", "oox", "ejjuyyy", "plmiis", "xxxzgpsssa", "xxwwkktt", "znnnnfqknaz", "qqquuhii", "dvvvwz"] a2 = ["cccooommaaqqoxii", "gggqaffhhh", "tttoowwwmmww"] mxdiflg(a1, a2) --> 13
Code language: JavaScript (javascript)

The solution in Python

Option 1:

def mxdiflg(a1, a2): if a1 and a2: return max( len(max(a1, key=len)) - len(min(a2, key=len)), len(max(a2, key=len)) - len(min(a1, key=len))) return -1
Code language: Python (python)

Option 2:

def mxdiflg(a1, a2): if a1 and a2: return max(abs(len(x) - len(y)) for x in a1 for y in a2) return -1
Code language: Python (python)

Option 3:

def mxdiflg(a1, a2): if not a1 or not a2: return -1 max_a1 = max([len(x) for x in a1]) min_a1 = min([len(x) for x in a1]) max_a2 = max([len(x) for x in a2]) min_a2 = min([len(x) for x in a2]) return max(max_a1 - min_a2, max_a2 - min_a1)
Code language: Python (python)

Test cases to validate our solution

test.describe("mxdiflg")"Basic tests") s1 = ["hoqq", "bbllkw", "oox", "ejjuyyy", "plmiis", "xxxzgpsssa", "xxwwkktt", "znnnnfqknaz", "qqquuhii", "dvvvwz"] s2 = ["cccooommaaqqoxii", "gggqaffhhh", "tttoowwwmmww"] test.assert_equals(mxdiflg(s1, s2), 13) s1 = ["ejjjjmmtthh", "zxxuueeg", "aanlljrrrxx", "dqqqaaabbb", "oocccffuucccjjjkkkjyyyeehh"] s2 = ["bbbaaayddqbbrrrv"] test.assert_equals(mxdiflg(s1, s2), 10) s1 = ["ccct", "tkkeeeyy", "ggiikffsszzoo", "nnngssddu", "rrllccqqqqwuuurdd", "kkbbddaakkk"] s2 = ["tttxxxxxxgiiyyy", "ooorcvvj", "yzzzhhhfffaaavvvpp", "jjvvvqqllgaaannn", "tttooo", "qmmzzbhhbb"] test.assert_equals(mxdiflg(s1, s2), 14) s1 = [] s2 = ["cccooommaaqqoxii", "gggqaffhhh", "tttoowwwmmww"] test.assert_equals(mxdiflg(s1, s2), -1) s2 = [] s1 = ["cccooommaaqqoxii", "gggqaffhhh", "tttoowwwmmww"] test.assert_equals(mxdiflg(s1, s2), -1) s1 = [] s2 = [] test.assert_equals(mxdiflg(s1, s2), -1) from random import randint def mxdiflgSol(a1, a2): mx = -1 for x in a1: for y in a2: diff = abs(len(x) - len(y)) if (diff > mx): mx = diff return mx def do_ex(k): a1, i = [], while (i < k): res, j = "", while (j < randint(1, 20)): res += chr(randint(97, 122)) * randint(1, 3) j += 1 a1.append(res) i += 1 return a1 def randomTests(): print("100 Random tests ****************** ") for _ in range(, 100): s1 = do_ex(randint(, 10)) s2 = do_ex(randint(, 8)) test.assert_equals(mxdiflg(s1, s2), mxdiflgSol(s1, s2)) randomTests()
Code language: Python (python)

See also  [Solved] ZipArchive extension: disabled/not installed on Ubuntu
Notify of
Inline Feedbacks
View all comments
Would love your thoughts, please comment.x