Unique characters

Unique characters is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Task

Given a list of strings find characters appearing only one string and once only.
The result give in alphabetical order.
Let list = ["133252abcdeeffd", "a6789798st","yxcdfgxcyz"]

Factor

Works with: Factor version 0.99 build 2074

<lang factor>USING: io sequences sets.extras sorting ;

{ "133252abcdeeffd" "a6789798st" "yxcdfgxcyz" } concat non-repeating natural-sort print</lang>

Output:

156bgstz

Julia

<lang julia>list = ["133252abcdeeffd", "a6789798st", "yxcdfgxcyz"]

function is_once_per_all_strings_in(a::Vector{String})

   charlist = collect(prod(a))
   counts = Dict(c => count(x -> c == x, charlist) for c in unique(charlist))
   return sort([p[1] for p in counts if p[2] == 1])

end

println(is_once_per_all_strings_in(list))

</lang>

Output:

['1', '5', '6', 'b', 'g', 's', 't', 'z']

Raku

One has to wonder where the digits 0 through 9 come in the alphabet... 🤔 For that matter, What alphabet should they be in order of? Most of these entries seem to presuppose ASCII order but that isn't specified anywhere. What to do with characters outside of ASCII (or Latin-1)? Unicode ordinal order? Or maybe DUCET Unicode collation order? It's all very vague.

<lang perl6>my @list = <133252abcdeeffd a6789798st yxcdfgxcyz>;

for @list, (@list, 'AАΑSäaoö٥🤔👨‍👩‍👧‍👧') {

   say "$_\nSemi-bogus \"Unicode natural sort\" order: ",
   .map( *.comb ).Bag.grep( *.value == 1 )».key.sort( { .unival, .NFKD[0], .fc } ).join,
   "\n        (DUCET) Unicode collation order: ",
   .map( *.comb ).Bag.grep( *.value == 1 )».key.collate.join, "\n";

}</lang>

Output:

133252abcdeeffd a6789798st yxcdfgxcyz
Semi-bogus "Unicode natural sort" order: 156bgstz
        (DUCET) Unicode collation order: 156bgstz

133252abcdeeffd a6789798st yxcdfgxcyz AАΑSäaoö٥🤔👨‍👩‍👧‍👧
Semi-bogus "Unicode natural sort" order: 15٥6ASäbgoöstzΑА👨‍👩‍👧‍👧🤔
        (DUCET) Unicode collation order: 👨‍👩‍👧‍👧🤔ä15٥6AbögosStzΑА

Ring

<lang ring> see "working..." + nl see "Unique characters are:" + nl row = 0 str = "" cList = [] uniqueChars = ["133252abcdeeffd", "a6789798st","yxcdfgxcyz"] for n = 1 to len(uniqueChars)

   str = str + uniqueChars[n]

next for n = 1 to len(str)

   ind = count(str,str[n])
   if ind = 1
      row = row + 1
      add(cList,str[n])
   ok

next cList = sort(cList) for n = 1 to len(cList)

   see "" + cList[n] + " "

next see nl

see "Found " + row + " unique characters" + nl see "done..." + nl

func count(cString,dString)

    sum = 0
    while substr(cString,dString) > 0
          sum++
          cString = substr(cString,substr(cString,dString)+len(string(sum)))
    end
    return sum

</lang>

Output:

working...
Unique characters are:
1 5 6 b g s t z 
Found 8 unique characters
done...

Wren

Library: Wren-seq

Library: Wren-sort

<lang ecmascript>import "/seq" for Lst import "/sort" for Sort

var strings = ["133252abcdeeffd", "a6789798st","yxcdfgxcyz"] var totalChars = strings.reduce { |acc, str| acc + str }.toList var uniqueChars = Lst.individuals(totalChars).where { |l| l[1] == 1 }.map { |l| l[0] }.toList Sort.insertion(uniqueChars) System.print("Found %(uniqueChars.count) unique character(s), namely:") System.print(uniqueChars.join(" "))</lang>

Output:

Found 8 unique character(s), namely:
1 5 6 b g s t z