justin2004/a.apl

## a.apl
torusVowels←{
  v←  ⎕av  ⍝ vector of chars (that we index into)
  c←  v⍳⍵ ⍝ c as in cipher text (using indexes instead of chars)
  m←c∊v⍳'aeiou' ⍝ mask of vowels
  v[(m\¯1⌽0~⍨m×c)+ c×~m]
  ⍝                ^ keep the consonants
  ⍝          ^ select the only vowels
  ⍝    ^ then do a ¯1 rotate to shift them to the right
  ⍝  ^ finally expand using the mask so we can recombine vowels and consonants
}

## a.py
def torusVowels(s):
   x=[i for i,c in enumerate(s)if c.lower()in"aeiou"]
   l=list(s)
   for i in range(len(x)):l[x[(i+1)%len(x)]]=s[x[i]]if x else s[x[i]]
   return''.join(l)
	torusVowels←{
	v← ⎕av ⍝ vector of chars (that we index into)
	c← v⍳⍵ ⍝ c as in cipher text (using indexes instead of chars)
	m←c∊v⍳'aeiou' ⍝ mask of vowels
	v[(m\¯1⌽0~⍨m×c)+ c×~m]
	⍝ ^ keep the consonants
	⍝ ^ select the only vowels
	⍝ ^ then do a ¯1 rotate to shift them to the right
	⍝ ^ finally expand using the mask so we can recombine vowels and consonants
	}
	def torusVowels(s):
	x=[i for i,c in enumerate(s)if c.lower()in"aeiou"]
	l=list(s)
	for i in range(len(x)):l[x[(i+1)%len(x)]]=s[x[i]]if x else s[x[i]]
	return''.join(l)