cattle = "yahoo"
p container = [cattle, cattle]
cattle[2] = "p"
p cattle[2]
cattle[2]="p"# =>cattle = yapoo
puts cattle[2]# =>p
+++++++++++++++++++++++++++++
下面的是irb运行结果:
C:\Users\Administrator>irb
irb(main):001:0>cattle="yahoo"
=>"yahoo"
irb(main):002:0>p container = [cattle,cattle]
["yahoo", "yahoo"]
=>["yahoo", "yahoo"]
irb(main):003:0>cattle[2]="p"
=>"p"
irb(main):004:0>p cattle[2]
"p"
=>"p"
irb(main):005:0>print cattle[2]
p=>nil
irb(main):006:0>puts cattle[2]
p
=>nil
irb(main):007:0>