Quote all the value of an array as text-CodePudding

I have the following array:

arr1=("a" "b" "c" "d" "e" "f")

and I want to display the array as quote. So my expected output from echo would be this:

AA_ENABLE_HOOKS=("a" "b" "c" "d" "e" "f")

I have done the following code it almost display what I want but I don't like it:

#!/bin/bash

arr1=("a" "b" "c" "d" "e" "f")

var_quote=$( printf "\"%s\" " "${arr1[@]}")

echo "AA_ENABLE_HOOKS=(${var_quote})"

The output is

AA_ENABLE_HOOKS=("a" "b" "c" "d" "e" "f" ) // notice I have space at the end

Is there alternative for my above code in bash?

My current workaround for one-liner command is:

echo "AA_ENABLE_HOOKS=($( printf "\"%s\" " "${arr1[@]}" | sed -e 's/\ *$//g'))"

CodePudding user response：

To remove the space at the end of the output string, you can use the ${var_quote% } syntax, which removes the trailing space character from the $var_quote variable.

Here is an updated version of your script that uses this syntax:

#!/bin/bash

arr1=("a" "b" "c" "d" "e" "f")

var_quote=$( printf "\"%s\" " "${arr1[@]}")

# Remove the trailing space character from $var_quote
var_quote=${var_quote% }

echo "AA_ENABLE_HOOKS=(${var_quote})"

This should produce the output AA_ENABLE_HOOKS=("a" "b" "c" "d" "e" "f") without the space at the end.