Class: Array::SampleRandom

Inherits:

Object

Object
Array::SampleRandom

Defined in:: opal/opal/corelib/array.rb

Instance Method Summary collapse

#initialize(rng) ⇒ SampleRandom constructor
A new instance of SampleRandom.
#rand(size) ⇒ Object

Constructor Details

#initialize(rng) ⇒ `SampleRandom`

Returns a new instance of SampleRandom.

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# File 'opal/opal/corelib/array.rb', line 1785
def initialize(rng)
 @rng = rng
end

Instance Method Details

#rand(size) ⇒ `Object`

Raises:

(RangeError )

# File 'opal/opal/corelib/array.rb', line 1789
def rand(size)
 random = `$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