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?0.5 Marksnames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname=${names[$RANDOM % ${#names[@]}]}if [[ "$name" != "$prev_name" ]]; thenecho "Generated name: $name"prev_name="$name"breakfidonenames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname=${names[$RANDOM % ${#names[@]}]}if [ "$name" == "$prev_name" ]; thencontinueelseecho "Generated name: $name"prev_name="$name"breakfidonenames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname=${names[$RANDOM % ${#names[@]}]}if [ "$name" == "$prev_name" ]; thenecho "Generated name: $name"prev_name="$name"breakfidonenames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname=${names[$RANDOM % ${#names[@]}]}if [[ "$name" == "$prev_name" ]]; thencontinueelseecho "Generated name: $name"prev_name="$name"breakfidonenames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname=${names[$RANDOM % ${#names[@]}]}if [ "$name" != "$prev_name" ]; thenecho "Generated name: $name"prev_name="$name"breakfidone
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?0.5 Marksnames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname={names[RANDOM % {#names[@]}]}if [[ "name" != "name"prev_name="{names[{#names[@]}]}if [ "prev_name" ]; thencontinueelseecho "Generated name: name"breakfidonenames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname={names[RANDOM % {#names[@]}]}if [ "name" == "name"prev_name="{names[{#names[@]}]}if [[ "prev_name" ]]; thencontinueelseecho "Generated name: name"breakfidonenames=("Alice" "Bob" "Charlie" "David")prev_name=""while true; doname={names[RANDOM % {#names[@]}]}if [ "name" != "name"prev_name="$name"breakfidone
Solution
The correct code snippet is:
names=("Alice" "Bob" "Charlie" "David")
prev_name=""
while true; do
name=${names[$RANDOM % ${#names[@]}]}
if [[ "$name" != "$prev_name" ]]; then
echo "Generated name: $name"
prev_name="$name"
break
fi
done
This script works by creating an array of names and an empty string to hold the previous name. It then enters a while loop, which will continue indefinitely until it is explicitly broken.
Inside the loop, it generates a random index into the array of names and assigns the name at that index to the variable name. It then checks if this name is the same as the previous name. If it is not, it prints the generated name, assigns the current name to prev_name for the next iteration, and breaks the loop. If the name is the same as the previous one, it simply continues to the next iteration of the loop, generating a new random name.
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