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You're writing a Bash script that reads a list of names from a file and generates a random name from the list. The generated name should not be a duplicate of the previous one. Which code snippet correctly implements this behavior using a while loop?

Question

You're writing a Bash script that reads a list of names from a file and generates a random name from the list. The generated name should not be a duplicate of the previous one. Which code snippet correctly implements this behavior using a while loop?

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Solution

Here is a Bash script that reads a list of names from a file and generates a random name from the list. The generated name will not be a duplicate of the previous one.

#!/bin/bash

# Read the file into an array
mapfile -t names < names.txt

# Initialize previousName to an empty string
previousName=""

while true; do
  # Generate a random index
  index=$(($RANDOM % ${#names[@]}))

  # Get the name at the random index
  name=${names[$index]}

  # If the name is not the same as the previous one, print it and update previousName
  if [ "$name" != "$previousName" ]; then
    echo $name
    previousName=$name
  fi
done

This script uses the mapfile command to read the file into an array. It then enters a while loop, where it generates a random index into the array. It retrieves the name at that index and checks if it is the same as the previous name. If it is not, it prints the name and updates previousName. This ensures that the same name will not be printed twice in a row.

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