Running External Programs

Julia borrows backtick notation for commands from the shell, Perl, and Ruby. However, in Julia, writing

julia> `echo hello`
`echo hello`

differs in several aspects from the behavior in various shells, Perl, or Ruby:

Instead of immediately running the command, backticks create a Cmd object to represent the command. You can use this object to connect the command to others via pipes, run it, and read or write to it.
When the command is run, Julia does not capture its output unless you specifically arrange for it to. Instead, the output of the command by default goes to STDOUT as it would using libc‘s system call.
The command is never run with a shell. Instead,
登录查看完整内容