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ursm/map.rb

Created October 14, 2016 10:53
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map.rb
_ = (0..1000000).to_a.map {|i| i * 2 }
# _ = (0..1000000).to_a.map! {|i| i * 2 }
puts File.read("/proc/#{Process.pid}/status").lines.grep(/^VmHWM:/)
# map => VmHWM: 25408 kB
# map! => VmHWM: 17544 kB
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