Standalone Julia

We know that the Julia command recognizes a number of “switches” to modify its behavior; these can be listed by typing julia -h (or --help).

The dual nature of -h and –help is an example of a short and a long argument. All arguments have a long form, but only those deemed to be “common” also have a short one.

We met one such, --procs, in the previous chapter, which does have a shortened version, -p, the purpose of which is to define the number of processors rather than using the nprocs() routine in the code.

In the definition of the prior juliet alias, a couple of short forms were used (-i and -e), but –interactive and –eval could equally well have been chosen.

One form of start command I often use is julia --banner=no --color=no, since I have no need for a banner and do not like the color scheme in the REPL. It would also be possible to use -q/--quiet as a substitute for the --banner switch, but this has...