Array Assignments
suggest changeList Assignment
If you are familiar with Perl, C, or Java, you might think that Bash would use commas to separate array elements, however this is not the case; instead, Bash uses spaces:
# Array in Perl
my @array = (1, 2, 3, 4);
# Array in Bash
array=(1 2 3 4)
Create an array with new elements:
array=('first element' 'second element' 'third element')
Subscript Assignment
Create an array with explicit element indices:
array=([3]='fourth element' [4]='fifth element')
Assignment by index
array[0]='first element'
array[1]='second element'
Assignment by name (associative array)
declare -A array
array[first]='First element'
array[second]='Second element'
Dynamic Assignment
Create an array from the output of other command, for example use seq to get a range from 1 to 10:
array=(`seq 1 10`)
Assignment from script’s input arguments:
array=("$@")
Assignment within loops:
while read -r; do
#array+=("$REPLY") # Array append
array[$i]="$REPLY" # Assignment by index
let i++ # Increment index
done < <(seq 1 10) # command substitution
echo ${array[@]} # output: 1 2 3 4 5 6 7 8 9 10
where $REPLY
is always the current input
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