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实例公共方法

===(value)

扩展默认的 Range#=== 以支持范围比较。

(1..5) === (1..5)  # => true
(1..5) === (2..3)  # => true
(1..5) === (1...6) # => true
(1..5) === (2..6)  # => false

本机 Range#=== 行为保持不变。

('a'..'f') === ('c') # => true
(5..9) === (11) # => false

给定的范围必须完全有界，具有起点和终点。

源代码：显示 | 在 GitHub 上

# File activesupport/lib/active_support/core_ext/range/compare_range.rb, line 16
def ===(value)
  if value.is_a?(::Range)
    is_backwards_op = value.exclude_end? ? :>= : :>
    return false if value.begin && value.end && value.begin.public_send(is_backwards_op, value.end)
    # 1...10 includes 1..9 but it does not include 1..10.
    # 1..10 includes 1...11 but it does not include 1...12.
    operator = exclude_end? && !value.exclude_end? ? :< : :<=
    value_max = !exclude_end? && value.exclude_end? ? value.max : value.last
    super(value.first) && (self.end.nil? || value_max.public_send(operator, last))
  else
    super
  end
end

include?(value)

扩展默认的 Range#include? 以支持范围比较。

(1..5).include?(1..5)  # => true
(1..5).include?(2..3)  # => true
(1..5).include?(1...6) # => true
(1..5).include?(2..6)  # => false

本机 Range#include? 行为保持不变。

('a'..'f').include?('c') # => true
(5..9).include?(11) # => false

给定的范围必须完全有界，具有起点和终点。

源代码：显示 | 在 GitHub 上

# File activesupport/lib/active_support/core_ext/range/compare_range.rb, line 41
def include?(value)
  if value.is_a?(::Range)
    is_backwards_op = value.exclude_end? ? :>= : :>
    return false if value.begin && value.end && value.begin.public_send(is_backwards_op, value.end)
    # 1...10 includes 1..9 but it does not include 1..10.
    # 1..10 includes 1...11 but it does not include 1...12.
    operator = exclude_end? && !value.exclude_end? ? :< : :<=
    value_max = !exclude_end? && value.exclude_end? ? value.max : value.last
    super(value.first) && (self.end.nil? || value_max.public_send(operator, last))
  else
    super
  end
end