Or: Use "${array[@]}" (with quotes) to prevent whitespace problems.

cp $* ~/dir
cp ${array[*]} ~/dir

cp "$@" ~/dir
cp "${array[@]}" ~/dir

$* and ${array[*]}, unquoted, is subject to word splitting and globbing.

Let's say you have three arguments or array elements: baz, foo bar and *

"$@" and "${array[@]}" will expand into exactly that: baz, foo bar and *

$* and ${array[*]} will expand into multiple other arguments: baz, foo, bar, file.txt and otherfile.jpg

Since the latter is rarely expected or desired, ShellCheck warns about it.

None.