How to combine a string and array

Question

I have an array of numbers 0 10 20 30 40 and I am trying to add a string to the front the array so that the output will look like this: 1D: 0 10 20 30 40

I've tried coding it this way:

string="1D: "
new=( $(( $string + ${array[@]} )) )
echo $new

Which gives me this error:

-bash: 1D: value too great for base (error token is "1D")

Can someone assist me in this problem?

Thanks!

anubhava · Accepted Answer · 2018-10-06 14:52:06Z

2

You can use:

array=(0 10 20 30 40)
string="1D:"
new=("$string" "${array[@]}")

Check new array:

declare -p new

declare -a new='([0]="1D:" [1]="0" [2]="10" [3]="20" [4]="30" [5]="40")'

Or else:

echo "${new[@]}"
1D: 0 10 20 30 40

answered Oct 6, 2018 at 14:52

anubhava

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2 Comments

djl Over a year ago

Thanks @anubhava. Is there also a way to make this into a string? This array is meant to be used as input for a flag option in some software I'm using. Normally the line of code would look like -concat '1D: 0 10 20 30 40', but I'm trying to do it like this -concat '$new' however the software is giving me an error there. Also, I've adjusted my variable so that it's new=echo ${new[@]}

anubhava Over a year ago

@djl: That looks like a different problem. You may please post a new question and we'll try to help you out.

sparrow · Accepted Answer · 2018-10-06 15:32:43Z

0

If you need to prepend a string to an array you can do something like this

array=("0" "10" "20" "30" "40")
array=("1D:" "${array[@]}")
echo ${array[@]}

output will be

1D: 0 10 20 30 40

answered Oct 6, 2018 at 15:32

sparrow

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