Vowels up, consonants down

Question

Challenge

You will be given a string that can contain lowercase letters, uppercase letters, or spaces. You have to turn the vowels (a, e, i, o, u) in the string to upper case and consonants to lower case. This applies whether or not the letter was originally upper case or lower case. Spaces remain as is. Note that "y" is a consonant.

Examples

Hello World -> hEllO wOrld
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVXWYZ -> AbcdEfghIjklmnOpqrstUvwxyz AbcdEfghIjklmnOpqrstUvxwyz

Info

• The input string can contain letters A to Z, lowercase or uppercase, and spaces.

Input

The string

Output

The formatted string (Vowels uppercase and consonants lowercase).

Answer 1

Swift, 125 bytes

Short version:

func c(_ t:String)->String{return t.lowercased().map({String($0)}).map({"aeiou".contains($0) ?$0.uppercased():$0}).joined()}

Verbose version:

func c2 (_ t: String) -> String {
    let s = t.map({String($0).lowercased()})
    let lv = ["a", "e", "i", "o", "u"]

    let r = s.map { l in
        lv.contains(l) ? l.uppercased() : l
    }.joined()
    
    return r
}

Answer 2

APL(NARS), 45 chars

{⍵∊⎕A∼'AEIOU':⎕a[⎕A⍸⍵]⋄⍵∊'aeiou':⎕A[⎕a⍸⍵]⋄⍵}¨

test & how to use:

      f←{⍵∊⎕A∼'AEIOU':⎕a[⎕A⍸⍵]⋄⍵∊'aeiou':⎕A[⎕a⍸⍵]⋄⍵}¨
      f 'Hello World' 
hEllO wOrld

Answer 3

Uiua ^SBCS, 14 bytes

¯⍜▽¯∊,"AEIOU"⌵

Try it!

0.9.0 recently extended abs and negate to work on characters, making this much easier.

¯⍜▽¯∊,"AEIOU"⌵
             ⌵  # uppercase the input
    ∊,"AEIOU"   # mask of vowels
 ⍜▽¯            # swap case at indices given by the mask
¯               # swap case

Answer 4

jBasher2, 437 bytes

create a with type string
ask for input
turn that into lowercase
set that to a
create l with type number
get length of a
set that to l
create i with type number
set 0 to i
create t with type string
create o with type string
while i < l
get item from a at i
set that to t
get location of t inside "aeiou
set that to o
spawn t
if o >= 0
turn t into uppercase
endif
output inline that
add i by 1
set that to i
endwhile

Answer 5

Uiua, 14 bytes

¯⍜▽¯∈"AEIOU".⌵

Try it!

¯⍜▽¯∈"AEIOU".⌵
              ⌵ # uppercase
 ⍜▽ ∈"AEIOU".   # under keeping the vowels
    ¯           # lowercase
¯               # flip case

Answer 6

Python 3, 82 bytes

f=lambda c:c.upper()if c in 'aeiou'else c.lower();lambda s:''.join(map(f,list(s)))