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  1. #!/bin/bash
  2.  
  3. # explicitly set $1
  4. set -- 123
  5.  
  6. array=()
  7. permutation() {
  8.  
  9.   local items="$1"
  10.   local out="$2"
  11.   local i
  12.   [[ "$items" == "" ]] && array+=( "$out" ) && return
  13.   for (( i=0; i<${#items}; i++ )) ; do
  14.     permutation "${items:0:i}${items:i+1}" "$out${items:i:1}"
  15.   done
  16.   }
  17.  
  18. permutation $1
  19.  
  20. for i in "${array[@]}"
  21. do 
  22.   echo "$i"
  23. done
  24.  
Success #stdin #stdout 0s 19664KB
comments (?)
stdin
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Standard input is empty
stdout
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123
132
213
231
312
321
https://ideone.com/zIYigA
language:
Bash (bash 5.0.3)
created:
6 years ago
visibility:
public

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