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| irb(main):008:0> block = Proc.new{print "Hello"} | |
| => #<Proc:0x00000001016f45f8@(irb):8> | |
| irb(main):009:0> new_block = Proc.new{|block| block.call; print ", World!"} | |
| => #<Proc:0x00000001016e6750@(irb):9> | |
| irb(main):010:0> new_block.call(block) | |
| Hello, World!=> nil | |
| irb(main):011:0> |
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