Ruby Language Arrays Create Array with Array::new
Example
An empty Array ([]) can be created with Array's class method, Array::new:
Array.new
To set the length of the array, pass a numerical argument:
Array.new 3 #=> [nil, nil, nil]
There are two ways to populate an array with default values:
- Pass an immutable value as second argument.
- Pass a block that gets current index and generates mutable values.
Array.new 3, :x #=> [:x, :x, :x]
Array.new(3) { |i| i.to_s } #=> ["0", "1", "2"]
a = Array.new 3, "X" # Not recommended.
a[1].replace "C" # a => ["C", "C", "C"]
b = Array.new(3) { "X" } # The recommended way.
b[1].replace "C" # b => ["X", "C", "X"]
