Shell Programming and Scripting

Red
Blue
Green
Yellow
White
Pink
Black

tail -${LEFT_OVR} color.txt

Pink
Black

if [ "$color" = "Pink" ] || [ "$color" = "Black" ]

tail -${LEFT_OVR} color.txt > tail_out
one_line=`awk 'BEGIN { ORS = " " } { print }' tail_out`

COND=""
for c in $one_line
do
COND="[ color = $c ] $COND"
done

tail -${LEFT_OVR} color.txt | { while read CND; do CMD+="[ color = $CND ] || "; done; echo ${CMD% || }; }
[ color = Yellow ] || [ color = White ] || [ color = Pink ] || [ color = Black ]

$ cat case_test
t1=Red
t2=Yellow
t3=Green
t4=Brown
t5=Blue
t6=Pink
t7=Black

case $1 in
 $t1) echo "The red ball is worth 1 point."         ;;
 $t2) echo "The yellow ball is worth 2 points."     ;;
 $t3) echo "The green ball is worth 3 points."      ;;
 $t4) echo "The brown ball is worth 4 points."      ;;
 $t5) echo "The blue ball is worth 5 points."       ;;
 $t6) echo "The pink ball is worth 6 points."       ;;
 $t7) echo "The black ball is worth 7 points."      ;;
 *)   echo "Any other option is a foul."            ;;
esac

$ ./case_test Yellow
The yellow ball is worth 2 points.
$ ./case_test White 
Any other option is a foul.
$

[[ "$(tail -${LEFT_OVR} color.txt | tr '\n' ' ' )" =~ "$color" ]] && echo good || echo bad

#!/bin/bash
C=1
declare -A  BALL

while read color;do
	BALL[${color,,}]=$C
	C=$(( $C + 1 ))
done<"${0/sh/txt}"

echo "Ball $1 is worth ${BALL[${1,,}]}"

+ bin $ sh ~/tmp/sample.sh pink
Ball pink is worth 6
:) bin $ sh ~/tmp/sample.sh red 
Ball red is worth 1

C=1
declare -A  BALL

while read color;do
....
done<"${0/sh/txt}"

	BALL[${color,,}]=$C
	C=$(( $C + 1 ))

echo "Ball $1 is worth ${BALL[${1,,}]}"