Files
exercism/bash/secret-handshake/secret_handshake.sh
2021-08-08 21:11:22 +02:00

27 lines
462 B
Bash
Executable File

#!/usr/bin/env bash
num=$1
strings=(
"wink"
"double blink"
"close your eyes"
"jump"
)
reverse=n
result=()
(( $num & 2#10000 )) && reverse=y
# get matching bits
for (( i=0 ; i<4 ; ++i )); do
(( $num & 1<<$i )) && result+=( "${strings[$i]}" )
done
# output in normal or reverse order
for (( i=0 ; i<${#result[@]} ; ++i)) ; do
[[ $reverse == n ]] && echo -n "$sep${result[i]}" || echo -n "$sep${result[~i]}"
sep=","
done
echo
exit 0