class Array

Public Instance Methods

extract!() { |element| ... } click to toggle source

Removes and returns the elements for which the block returns a true value. If no block is given, an Enumerator is returned instead.

numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
odd_numbers = numbers.extract! { |number| number.odd? } # => [1, 3, 5, 7, 9]
numbers # => [0, 2, 4, 6, 8]
# File lib/sigterm_extensions/core_ext/array/extract.rb, line 8
def extract!
  return to_enum(:extract!) { size } unless block_given?

  extracted_elements = []

  reject! do |element|
    extracted_elements << element if yield(element)
  end

  extracted_elements
end
extract_options!() click to toggle source

Extracts options from a set of arguments. Removes and returns the last element in the array if it's a hash, otherwise returns a blank hash.

def options(*args)
  args.extract_options!
end

options(1, 2)        # => {}
options(1, 2, a: :b) # => {:a=>:b}
# File lib/sigterm_extensions/core_ext/array/extract_options.rb, line 22
def extract_options!
  if last.is_a?(Hash) && last.extractable_options?
    pop
  else
    {}
  end
end