Determine if a string has all unique characters: Difference between revisions

=={{header|Nim}}==

<lang Nim>import unicode, strformat

proc checkUniqueChars(s: string) =

echo fmt"Checking string ""{s}"":"

let runes = s.toRunes

for i in 0..<runes.high:

let rune = runes[i]

for j in (i+1)..runes.high:

if runes[j] == rune:

echo "The string contains duplicate characters."

echo fmt"Character {rune} ({int(rune):x}) is present at positions {i+1} and {j+1}."

echo ""

return

echo "All characters in the string are unique."

echo ""

const Strings = ["",

".",

"abcABC",

"XYZ ZYX",

"1234567890ABCDEFGHIJKLMN0PQRSTUVWXYZ",

"hétérogénéité",

"🎆🎃🎇🎈",

"😍😀🙌💃😍🙌",

"🐠🐟🐡🦈🐬🐳🐋🐡"]

for s in Strings:

s.checkUniqueChars()</lang>

{{out}}

<pre>Checking string "":

All characters in the string are unique.

Checking string ".":

All characters in the string are unique.

Checking string "abcABC":

All characters in the string are unique.

Checking string "XYZ ZYX":

The string contains duplicate characters.

Character X (58) is present at positions 1 and 7.

Checking string "1234567890ABCDEFGHIJKLMN0PQRSTUVWXYZ":

The string contains duplicate characters.

Character 0 (30) is present at positions 10 and 25.

Checking string "hétérogénéité":

The string contains duplicate characters.

Character é (e9) is present at positions 2 and 4.

Checking string "🎆🎃🎇🎈":

All characters in the string are unique.

Checking string "😍😀🙌💃😍🙌":

The string contains duplicate characters.

Character 😍 (1f60d) is present at positions 1 and 5.

Checking string "🐠🐟🐡🦈🐬🐳🐋🐡":

The string contains duplicate characters.

Character 🐡 (1f421) is present at positions 3 and 8.</pre>