i am trying te write a shell script in alphametic ,
i have 5 parameters like this
$alphametic 5790813 BEAR RARE ERE RHYME
to get
ABEHMRY -> 5790813
i tried this :
#!/bin/bash
echo "$2 $3 $4 $5" | sed 's/ //g ' | sed 's/./&\n/g' | sort -n | sed '/^$/d' | uniq -i > testing
paste -sd '' testing > testing2
sed "s|^\(.*\)$|\1 -> ${1}|" testing2
but i get error (with the last command sed), i dont know where is the problem .
Another approach:
chars=$(printf '%s' "${@:2}" | fold -w1 | sort -u | paste -sd '')
echo "$chars -> $1"
sort's -n does't make sense here: these are letters, not numbers.
One idea using awk for the whole thing:
arg1="$1"
shift
others="$@"
awk -v arg1="${arg1}" -v others="${others}" '
BEGIN { n=split(others,arr,"") # split into into array of single characters
for (i=1;i<=n;i++) # loop through indices of arr[] array
letters[arr[i]] # assign characters as indices of letters[] array; eliminates duplicates
delete letters[" "] # delete array index for "<space>"
PROCINFO["sorted_in"]="@ind_str_asc" # sort array by index
for (i in letters) # loop through indices
printf "%s", i # print index to stdout
printf " -> %s\n", arg1 # finish off line with final string
}
'
NOTE: requires GNU awk for the PROCINFO["sorted_in"] (to sort the indices of the letters[] array)
This generates:
ABEHMRY -> 5790813
but i get errorwhat error?