I have this type of script, which asks for the user input and then stores it on an indexed array like:
#!/bin/bash
declare -a ka=()
for i in {1..4};
do
read -a ka > ka();
done
echo ${ka[@]}
I can't manage to append the read statement to the array.
When you run read -r -a arrayname, the entire array is rewritten starting from the very first item; it doesn't retain any of the prior contents.
Thus, read into a temporary array, and append that temporary array to your "real" / final one:
#!/usr/bin/env bash
case $BASH_VERSION in '') echo "ERROR: must be run with bash" >&2; exit 1;; esac
declare -a ka=()
for i in {1..4}; do
# only do the append if the read reports success
# note that if we're reading from a file with no newline on the last line, that last
# line will be skipped (on UNIX, text must be terminated w/ newlines to be valid).
read -r -a ka_suffix && ka+=( "${ka_suffix[@]}" )
done
# show current array contents unambiguously, one-per-line (echo is _very_ ambiguous)
printf ' - %q\n' "${ka[@]}"
> ka()supposed to do? Redirections specify a filename on the right-hand side, but asreadwrites nothing to stdout, it doesn't makes sense to write its nonexisting output anywhere at all.printf '%s\n' "${ka[@]}"to print array elements one-per-line if you don't need to disambiguate between element boundaries and literal newlines in the data.