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  1. Prepare
  2. Linux Shell
  3. Arrays in Bash
  4. Lonely Integer - Bash!
  5. Discussions

Lonely Integer - Bash!

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  • holger_achtziger
     + 0 comments

    !/bin/bash

    read -r n read -r line

    echo "$line" | tr " " "\n" | sort | uniq -u

  • meghanlyle4
     + 0 comments

    read N read m echo $m | tr ' ' '\n' > file.txt sort file.txt | uniq -u

  • I_AM_JD
     + 1 comment

    tr " " "\n" | tail +2 | sort | uniq -u tr is used so each array element in new line for further processing tail is used to skip 1st line which contain total no. of array elements sort for uniq cmd to work as desired uniq -u print only the uniq element

  • scarab_march6116
     + 0 comments
    read N
readarray numbers
printf "%s\n" ${numbers[@]} | sort -rn | uniq -u

  • csar_bello25
     + 0 comments
    read N
read -a arr

# We create the variable found to help us iterate
found=0
while [[ ${#arr[@]} -gt 1 ]]; do
    # We create an array with the existent indexes
    idx=()
    for i in ${!arr[@]}; do
        idx+=("$i")
    done
    
    # We pick the first value
    check=${arr[${idx[$found]}]}
    
    # We start the counter of matches
    count=0
    
    # We check the array counting matches
    for i in ${!arr[@]}; do
        if [[ "${arr[$i]}" -eq "$check" ]]; then
            ((count++))
        fi
    done
    
    # We check how many matches we have
    if [[ $count -eq 2 ]]; then
        # If we have 2 matcher, we delete ALL matches
        for i in ${!arr[@]}; do
            if [[ "${arr[$i]}" -eq "$check" ]]; then
                unset arr[$i]
            fi
        done
    else
        # Else, we have 1 match, aka the lonely integer
        # We increase the found, so the check value skips the one
        ((found++))
    fi
done
echo "${arr[@]}"