[Ruby笔记]25.local scope 本地作用域

code

# file : nest2.rb
class A
x = 'A'
module M
x = 'M'
class B
x = 'B'
def show_x
x = 'X'
puts x
end
puts x
end
puts x
end
puts x
end

puts "a = A.new"
a = A.new

puts "b = A::M::B.new"
b = A::M::B.new

puts "b.show_x"
b.show_x

output

a = A.new

b = A::M::B.new

show_x

B M A

ruby nest2.rb

PS C:\Users\Administrator\RubyCode> ruby nest2.rb
B
M
A
a = A.new
b = A::M::B.new
b.show_x
X

reference

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