Re: [julia-users] Re: How to read an external program's STDOUT using open()

[James Gilbert]

Turns out that there is a function *readandwrite() 
<http://docs.julialang.org/en/release-0.4/stdlib/base/#Base.readandwrite>* 
which 
does exactly what we need:

function main()
    letters = ["v", "w", "x", "y", "z"]
    str = join(["$a$b\n" for a in letters, b in letters])
    print("\nBefore grep:\n", str)

    (grepout, grepin, grep) = readandwrite(`grep y`)
    print(grepin, str)
    close(grepin)
    filtered_str = readall(grepout)
    print("\nAfter grep:\n", filtered_str)
end


main()