Using arrays in Bash

arrays_in_bash.md

Using arrays in bash

creating an array

$> my_array=(one two three)

accessing/setting elements

$> echo ${my_array}
one
$> echo ${my_array[0]}
one
$> echo ${my_array[1]}
two
$> my_array[4]=five

dumping values

$> echo ${my_array[@]}
one two three five

dumping indices

$> echo ${!my_array[@]}
0 1 2 4

counting elements

$> echo ${#my_array[@]}
4

stringify array (return as one element)

$> echo ${my_array[*]}
one two three four

iterating on an array using index

$> for index in ${!my_array[@]}; do echo "Element N°${index} => ${my_array[$index]}"; done
Element N°0 => one
Element N°1 => two
Element N°2 => three
Element N°4 => five

iterating on an array extracting values

$> for element in ${my_array[@]}; do echo "Found element ${element}"; done
Found element one
Found element two
Found element three
Found element five