Module: Yoshida::ArrayUtils

Defined in:
lib/yoshida/utils/array_utils.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.const_array(argument) ⇒ Object 



3
4
5
6
7
 
# File 'lib/yoshida/utils/array_utils.rb', line 3

def self.const_array(argument)
  array = argument.is_a?(Array) ? argument : argument.to_a
  array.extend ArrayUtils
  freeze_all(array)
end

.freeze_all(array) ⇒ Object 



18
19
20
21
22
 
# File 'lib/yoshida/utils/array_utils.rb', line 18

def self.freeze_all(array)
  array.each { |e| e.freeze }
  array.freeze
  array
end

.rand(array) ⇒ Object 



14
15
16
 
# File 'lib/yoshida/utils/array_utils.rb', line 14

def self.rand(array)
  array[Kernel.rand(array.length)].dup
end

.random_pick(array, n) ⇒ Object 



9
10
11
12
 
# File 'lib/yoshida/utils/array_utils.rb', line 9

def self.random_pick(array, n)
  indexes = (0...array.length).sort_by{Kernel.rand}[0...n]
  indexes.map { |n| array[n].dup }
end

Instance Method Details

#rand ⇒ Object 



28
29
30
 
# File 'lib/yoshida/utils/array_utils.rb', line 28

def rand
  ArrayUtils.rand(self)
end

#random_pick(n) ⇒ Object 



24
25
26
 
# File 'lib/yoshida/utils/array_utils.rb', line 24

def random_pick(n)
  ArrayUtils.random_pick(self, n)
end