ruby: problem on get random number with specific digit. and found reason(Confusing Range object and Array object)

gistfile1.rb

# this does not works. map called once.
p [1..10].map{|i|rand(9)}.join('')
# > "1"

# this works.
p [*1..10].map{|i|rand(9)}.join('')
# > "5012242033"

# difference is [*1..10] and [1..10]
# "*" expands Range object to list, but both are "Array" Class. strange...
p [1..10]
p [*1..10]
# > [1..10]
# > [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

# both of them are Array, but there are diffrence
# [1..10] is Array contained with single Range object(1..10).
# [*1..10] is Array contained with 1, 2, 3, 4, 5, 6, 7, 8, 9, 0

# this is why
p [1..10].map{|i|rand(9)}.join('')
# does not work as I expected.


# Found more easier solution. use bare Range object.
p (1..10).map{|i|rand(9)}.join('')
# > "5751656133"

BTW, how about 10.times.map {rand(9)}.join # and I think rand(10) is suitable in this case.