Extra Credit assignment: Arrays
Arrays are a list of strings or numbers and are popular in every programming language,
not just bash. You will need to see their awesome power to fully appreciate what they can
do for you.
Type this in:
names=(Paco Juan Dave Francois Helmut)
echo “The number of elements in the array names is ${#names[@]}”
echo “The first element in the array names has an index of 0 and is ${names[0]}”
echo “The length of ${names[0]} is ${#names[0]}”
for i in ${names[@]}; do
echo “I like the name $i.”
done
# Some more advanced string operators
# Now we can use some string operators on the strings (p.95 of Oreilly book)
# ${varname:offset:length}
echo ${names[0]:0] # This returns paco
echo ${names[0]:0:2] # This returns pa
echo ${names[0]:2] # This returns co
Your assignment: Take this script and see if you can make some innovative use of arrays
in bash scripting. There is an incredible amount of uses for them.