Class: Array::SampleRandom

Inherits:

Object

• Object
• Array::SampleRandom

Defined in:

opal/opal/corelib/array.rb

Instance Method Summary

• #initialize(rng) ⇒ SampleRandom constructor

  A new instance of SampleRandom.

• #rand(size) ⇒ Object

Constructor Details

#initialize(rng) ⇒ SampleRandom

Returns a new instance of SampleRandom

# File 'opal/opal/corelib/array.rb', line 1623

def initialize(rng)
  @rng = rng
end

Instance Method Details

#rand(size) ⇒ Object

Raises:

• (RangeError)

# File 'opal/opal/corelib/array.rb', line 1627

def rand(size)
  random = Opal.coerce_to @rng.rand(size), Integer, :to_int
  raise RangeError, "random value must be >= 0" if `random < 0`
  raise RangeError, "random value must be less than Array size" unless `random < size`

  random
end