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answer:-- open the file file = io.open("filename.txt", "r") -- read the contents of the file filetext = file:read("*all") -- convert hyphenated words to single words filetext = string.gsub(filetext, "%-%s", "") -- remove all punctuation except for apostrophes in contractions filetext = string.gsub(filetext, "%p", function(c) if c == "'" then return c else return " " end end) -- split the filetext into words using a space character as the separator words = {} for word in string.gmatch(filetext, "%S+") do table.insert(words, word) end -- count the number of words in the file wordcount = #words -- close the file io.close(file) -- print the word count print("The file contains " .. Wordcount .. " words.")

answer:Certainly! Here's the updated Lua script to count the unique words in a given text file: ``` -- Open the file file = io.open("filename.txt", "r") -- Read the contents of the file filetext = file:read("*all") -- Convert hyphenated words to single words filetext = string.gsub(filetext, "%-%s", "") -- Remove all punctuation except for apostrophes in contractions filetext = string.gsub(filetext, "%p", function(c) if c == "'" then return c else return " " end end) -- Split the filetext into words using a space character as the separator words = {} for word in string.gmatch(filetext, "%S+") do table.insert(words, word) end -- Count the number of words in the file wordcount = #words -- Create a table to store unique words unique_words = {} -- Loop through the words and add them to the unique_words table if they haven't been added yet for i, word in ipairs(words) do if not unique_words[word] then unique_words[word] = true end end -- Count the number of unique words unique_wordcount = 0 for word in pairs(unique_words) do unique_wordcount = unique_wordcount + 1 end -- Close the file io.close(file) -- Print the word count and unique word count print("The file contains " .. Wordcount .. " words, including " .. Unique_wordcount .. " unique words.") ``` This script creates a new `unique_words` table and loops through each word in the file to add it to the table if it hasn't already been added. After this, it simply counts the number of unique words in the `unique_words` table and prints both the word count and the unique word count. I hope this helps!

answer:Sure! Here are three examples of text files that might cause issues for this script, along with a description of the issues and how to handle them: 1. Text file with non-UTF-8 encoding: If a text file has a different encoding, the script may not be able to read it properly and may encounter errors. To resolve this issue, you can try converting the file to UTF-8 encoding using a tool like `iconv` or a text editor with encoding conversion capabilities. 2. Text file with non-standard word separators: If a text file uses non-standard word separators, such as underscores or slashes, the script may not split words correctly and may count them as separate words. To resolve this issue, you can modify the word matching pattern in the script to include the non-standard separators, such as `%S+` becoming `[%S_/]+`. 3. Text file with non-English words: If a text file contains non-English words, the script may count them as separate words even if they have the same stem or root as an English word. To resolve this issue, you can use a stemming algorithm or a language-specific library to normalize the words before counting them. For example, you could use the `luastem` library for Lua to stem words in multiple languages. I hope this helps! Let me know if you have any other questions.