Duplicate Character Counter in Lua (original) (raw)

Published on 18 February 2025 (Updated: 18 February 2025)

Duplicate Character Counter in Lua

Welcome to the Duplicate Character Counter in Lua page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

function duplicateCharacterCounter(word)
  local hasDuplicates = false;

  -- Empty or no input validation
  if word == "" or word == nil then 
    print("Usage: please provide a string")
    return

  -- Check for duplicates validation
  elseif (string.len(word) >= 1) then
    local myTable = {}
    local duplicateList = {}
    
    for i=1, string.len(word) do
      local char = string.sub(word, i, i)
      if (myTable[char]) then
        myTable[char] = myTable[char]+1
        hasDuplicates = true

      else
        myTable[char] = 1;
        table.insert(duplicateList, char)
      end
    end
    for _, char in ipairs(duplicateList) do
        if myTable[char] > 1 then
            print(char .. ": " .. myTable[char])
        end
    end
  end

  -- No duplicates validation
  if not (hasDuplicates) then
    print("No duplicate characters")
  end
end

duplicateCharacterCounter(arg[1])

Duplicate Character Counter in Lua was written by:

abdirashidexe

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

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How to Run the Solution

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