UNIX for Beginners Questions & Answers

#! /bin/bash declare -A crypt=(     ['@_banana']="A"     ['99_melon']="a"     ['AZ_GRAPE']="B"     ['!!_stars']="b"     ['81_xxxxxx']="C"     ['computer']="c"     ['111_space']=' '     ['life_9900']='!' )  encode () {     local word=$1     for ((i=0; i<${#word}; ++i)) ; do         local char=${word:$i:1}         printf %s' ' ${crypt[$char]}     done     printf '\n' }  declare -A decrypt for char in "${!crypt[@]}" ; do     key=${crypt[$char]}     decrypt[$key]=$char done  decode () {     local word=$1     while [[ $word ]] ; do         local code         for code in "${!decrypt[@]}"; do             if [[ $word == "$code"* ]] ; then                 printf %s "${decrypt[$code]}"                 word=${word#"$code"}             fi         done     done     printf '\n' }  encode '@_banana!!_starscomputerlife_9900'

Output:

encode '@_banana!!_starscomputerlife_9900'

Output: Abc!

#! /bin/bash 
declare -A crypt=(     ['@_banana']="A"     ['99_melon']="a"     ['AZ_GRAPE']="B"     ['!!_stars']="b"     ['81_xxxxxx']="C"     ['computer']="c"     ['111_space']=' '     ['life_9900']='!' )  

encode () 
{     
local word=$1     
for ((i=0; i<${#word}; ++i)) ; 
do
         local char=${word:$i:1}
         printf %s' ' ${crypt[$char]}
done
printf '\n' 
}  

declare -A decrypt 
for char in "${!crypt[@]}" 
do     
  key=${crypt[$char]}     
  decrypt[$key]=$char
done
 
decode () 
{     
local word=$1     
while [[ $word ]] ; 
do
         local code
         for code in "${!decrypt[@]}"; 
         do 
               if [[ $word == "$code"* ]] ; 
               then
                    printf %s "${decrypt[$code]}"
                    word=${word#"$code"}
               fi
         done
done
     printf '\n' 
} 
 
encode '@_banana!!_starscomputerlife_9900'

...
encode () {
        local word=$1
        for word in $1; do
                echo -n "${crypt[$word]} "
        done
        echo
}
...
encode '@_banana !!_stars computer life_9900'

encode () {
        for word in $@; do
                echo -n "${crypt[$word]} "
        done
        echo
}
encode @_banana !!_stars computer 111_space life_9900
decode () {
        while [ "$1" ]; do
                echo "$1"
               ...
                shift
        done
}
decode A a b c ' ' !

encode ()
{
local word=$1
while [[ $word ]] ;
do
         local code
         for code in "${!crypt[@]}";
         do
               if [[ $word == "$code"* ]] ;
               then
                    printf %s "${crypt[$code]}"
                    word=${word#"$code"}
               fi
         done
done
printf '\n'
}