Question

Program in Bash:

Write a program using bash script that can read a file from the same directory, sort the nonrepeating integers from 0-9 from smallest to largest, and output the results on the same line.

Do not use the sort function.

Answer 1

RAW CODE ### WITH COMMENTS ###

NUMBERS=( $(<file.txt) ) ### Reading unique numbers from file i.e. non-repeating

for ((i = 0; i<${#NUMBERS[@]}; i++)); do ### Here {#ARR[@]} Will return the length of array
    for ((j = 0; j<${#NUMBERS[@]}-i-1; j++)); do 
        if [ ${NUMBERS[j]} -gt ${NUMBERS[$((j+1))]} ]; then 
            dummy=${NUMBERS[j]} ## SWAPPING IF NUMBER AT X IS GREATER THAN (-gt) X+1.
            NUMBERS[$j]=${NUMBERS[$((j+1))]}   
            NUMBERS[$((j+1))]=$dummy 
        fi
    done
done

printf "%s\n" "${NUMBERS[@]}" > file_sorted.txt | uniq ### STORING SORTED VALUES IN FILE
Unique=( $(uniq <file_sorted.txt) ) 
rm file_sorted.txt ## Removing file, you can keep too, just  remove this line for keeping.
echo ${Unique[*]} ## PRINTING UNIQUE VALUES

SCREENSHOTS (CODE, TEXT FILE AND OUTPUT)

CODE

TEXT FILE

OUTPUT

##### FOR ANY QUERY, KINDLY GET BACK, THANKYOU. #####