问题
Lets say I have the object line from class Line:
class Line
def initialize point1, point2
@p1 = point1
@p2 = point2
end
end
line = Line.new...
How can I binary serialize the line object? I tried with:
data = Marshal::dump(line, "path/to/still/unexisting/file")
but it created file and didn't add anything. I read the Class: IO documentation but I couldn't really get it.
回答1:
Like this:
class Line
attr_reader :p1, :p2
def initialize point1, point2
@p1 = point1
@p2 = point2
end
end
line = Line.new([1,2], [3,4])
Save line
:
FNAME = 'my_file'
File.open(FNAME, 'wb') {|f| f.write(Marshal.dump(line))}
Retrieve into line1
:
line1 = Marshal.load(File.binread(FNAME))
Confirm it works:
line1.p1 # => [1, 2]
来源:https://stackoverflow.com/questions/21516511/how-to-write-to-file-when-using-marshaldump-in-ruby-for-object-serialization