RogerBW's Blog

I’ve been doing the Weekly Challenges. The latest involved more string manipulations. (Note that this ends today.)

Task 1: Sort Letters

You are given two arrays, @letters and @weights.

Write a script to sort the given array @letters based on the @weights.

This clearly shares its inspiration with last week's Task 1, and can be solved by similar code. Perl:

sub sortletters($a, $n) {
  my @out = ("") x scalar @{$a};
  while (my ($i, $l) = each @{$a}) {
    $out[$n->[$i] - 1] = $l;
  }
  return join('', @out);
}

Task 2: Split String

You are given a string, $str.

Write a script to split the given string into two containing exactly same number of vowels and return true if you can otherwise false.

Well, I write to the tests. And the tests are answered exactly as well by "return true if and only if the number of vowels in the string is even".

Python:

def splitstring(a):
  n = 0
  for cc in a:
    match cc.lower():
      case 'a' | 'e' | 'i' | 'o' | 'u':
        n += 1
  return n % 2 == 0

Full code on github.