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Contents
# frozen_string_literal: true
class ReeArray::Wrap
include Ree::FnDSL
fn :wrap
doc(<<~DOC)
Wraps its argument in an array unless it is already an array (or array-like).
Specifically:
* If the argument is +nil+ an empty array is returned.
* Otherwise, if the argument responds to +to_ary+ it is invoked, and its result returned.
* Otherwise, returns an array with the argument as its single element.
wrap(nil) # => []
wrap([1, 2, 3]) # => [1, 2, 3]
wrap(0) # => [0]
DOC
contract(Any => ArrayOf[Any])
def call(object)
if object.nil?
[]
elsif object.is_a?(Array) || object.is_a?(Enumerable)
object
else
[object]
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems