Array

var = Array(1) # => [1]
var = *1       # => [1]

# * is the same as Array

var = Array([1,2,3]) #=> [1,2,3]
var = *[1,2,3]       #=> [1,2,3]

# its useful when we need array like
var = [var] unless var.is_a? Array
var = [var].flatten

# we can write
var = *var     # => [var]
# but can't
*var           # => syntax error