Arrays in Bash
Arrays is useful when it comes to data processing. Using Arrays in Bash is quite easy, and most importantly is to get your job done with the data loaded into the Arrays.
Declare and Assign Value into Array
To declare an array in bash,
declare -a HELLO
To assign values into arrays
HELLO[0] = 'world'
To assign multiple values into arrays
HELLO=(hello world 'i am here')
To dump command line data into arrays
PROCESSID=(`ps ax | grep httpd`)
Output Values from Arrays
To output a value from an Array
HELLO[0] = 'world'
echo ${HELLO[0]}}
>> world
Loop through an Arrays and Output all the values
HELLO=(hello world 'i am here')
for values in ${HELLO[*]}
do
echo "${values}"
done
For more advance scripting on Arrays, visit http://tldp.org/LDP/abs/html/arrays.html
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