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open("/tmp/A", "w") {|io| io << 'foo' }
open("/tmp/B", "w") {|io| io << 'bar' }
FileUtils.mv("/tmp/A", "/tmp/B")
open("/tmp/B", "r") {|io| io.read } # => "foo"
|
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open("/tmp/A", "w") {|io| io << 'foo' }
open("/tmp/B", "w") {|io| io << 'bar' }
FileUtils.mv("/tmp/A", "/tmp/B")
open("/tmp/B", "r") {|io| io.read } # => "foo"
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