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AgileSoul
Asked: 2022-04-28 14:20:23 +0800 CST 2022-04-28 14:20:23 +0800 CST

How do I add a range of data to an array in Bash?

  • 772

I create an array of ranges and print their number of elements:

arrayRanks=({A..D} {1..4})
echo "El array tiene ${#arrayRanks[*]} elementos"

I can add an element to the end of the array while updating its number of elements:

arrayRanks[${#arrayRanks[*]}]=33
echo "El array ahora tiene ${#arrayRanks[*]} elementos"

So far so good, but if I want to add a range or a set of elements through a range at the end of the array or at the beginning, how can I do it?

array

1 Answers

  1. Best Answer

    You are adding a range using the expression bla=(cosas)and it works perfectly.

    To add more elements to an array you must use bla+=(más cosas). Notice that it is exactly the same expression, but with +=:

    $ arrayRanks=({A..B} {1..3})
$ printf "%s\n" "${arrayRanks[@]}" 
A
B
1
2
3
$ arrayRanks+=({M..N} {99..101})    # añadimos más valores con +=
$ printf "%s\n" "${arrayRanks[@]}" 
A
B
1
2
3
M
N
99
100
101

    To add data to the beginning, it occurs to me to redefine the array using array=(nuevos elementos "${arrayInicial[@]}"):

    $ arrayRanks=({a..c} ${arrayRanks[@]})
$ printf "%s\n" "${arrayRanks[@]}" 
a
b
c
a
b
c
A
B
...
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