Question

Write a script, shuffle.sh which generate. Unique integers and prints them out sorted in ascending order, and then shuffled. The count of the integers is given as a command-line argument.

• The shell variable RANDOM generates a random integer upon evaluation. In other words echo $ random prints a random integer.
• You may assume that the command line argument is a valid positive integer.
• Use only shell constructs and the array structure. In other words, don’t use commands such as sort, uniq, or shuf that can solve the problem with little effort.

Answer 1

#!/bin/bash
num=$*
#declare -a arr=(1 8 14 -4 123 12)
arr=()
if [ $num -lt 0 ]
then
   echo "Enter positive arguement only..."
else
   RANDOM=$$
   for i in `seq $num`
   do
       b=$RANDOM
#       echo $b
      
       for i in "$@"; do
           arr+=("$b")
       done
   done
fi

mysort(){
for((i=${#arr[@]}-1;i>=0; i--)); do
for((j=1;j<=$i; j++)); do
if [[ ${arr[j-1]} -gt ${arr[j]} ]]; then
temp="${arr[j-1]}"
arr[j-1]="${arr[j]}"
arr[j]="$temp"
fi
done
done
}

mysort $arr
printf '%s\n' "${arr[@]}"
#echo "${arr[@]}"

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