Class: GoogleMaps::Services::ArrayBox

Inherits:

Object

• Object
• GoogleMaps::Services::ArrayBox

Defined in:

lib/googlemaps/services/util.rb

Overview

Performs Array boxing.

Class Method Summary

• .contains_all?(arr, other) ⇒ TrueClass, FalseClass

  Determines if one array contains all elements of another array.

• .wrap(object) ⇒ Array

  Wrap its argument in an array unless it is already an array or (array-like).

Class Method Details

.contains_all?(arr, other) ⇒ TrueClass, FalseClass

Determines if one array contains all elements of another array.

Examples:

myarr = ["hello", "world"]
ArrayBox.contains_all? myarr, ["hello"] # true

Parameters:

• arr (Array) —

  target array.

• other (Array) —

  array to look for in the target array.

Returns:

• (TrueClass, FalseClass) —

  a boolean.

# File 'lib/googlemaps/services/util.rb', line 51

def self.contains_all?(arr, other)
  h = arr.inject(Hash.new(0)) {|h, i| h[i] += 1; h}
  other.each do |i|
    return false unless h.has_key?(i)
    return false if h[i].zero?
    h[i] -= 1
  end
  return true
end

.wrap(object) ⇒ Array

Wrap its argument in an array unless it is already an array or (array-like).

Examples:

Wrap any Object in a array

ArrayBox.wrap(nil)       # []
ArrayBox.wrap([1, 2, 3]) # [1, 2, 3]
ArrayBox.wrap(1)         # [1]

Parameters:

• object (Object) —

  Object to wrap.

Returns:

• (Array) —

  an array.

# File 'lib/googlemaps/services/util.rb', line 32

def self.wrap(object)
  if object.nil?
    []
  elsif object.respond_to? :to_ary
    object.to_ary || [object]
  else
    [object]
  end
end