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hg686
2015 May 14
2
Reading exit code of pipe()
The difference in the return value of close(pipeConnectionObject)
seems to depend on whether the pipe connection was opened via
the pipe() or open() functions (close() returns NULL)
> con <- pipe("ls")
> open(con, "r")
> readLines(con, n=1)
[1] "1032.R"
> print(close(con))
NULL
> con <- pipe("ls", "r")