I tried the following but i'm getting errors...am I missing something
here?
>> f = IO.popen("maxima")
=> #<IO:0x208d5e8>
>> f.puts "1+1;"
IOError: not opened for writing
from (irb):7:in `write'
from (irb):7:in `puts'
from (irb):7
>> f.close_write
IOError: closing non-duplex IO for writing
from (irb):8:in `close_write'
from (irb):8
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