SML Mode installation

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From the course by University of Washington

Programming Languages, Part A

829 ratings

University of Washington

Programming Languages, Part A

829 ratings

This course is an introduction to the basic concepts of programming languages, with a strong emphasis on functional programming. The course uses the languages ML, Racket, and Ruby as vehicles for teaching the concepts, but the real intent is to teach enough about how any language “fits together” to make you more effective programming in any language -- and in learning new ones. This course is neither particularly theoretical nor just about programming specifics -- it will give you a framework for understanding how to use language constructs effectively and how to design correct and elegant programs. By using different languages, you will learn to think more deeply than in terms of the particular syntax of one language. The emphasis on functional programming is essential for learning how to write robust, reusable, composable, and elegant programs. Indeed, many of the most important ideas in modern languages have their roots in functional programming. Get ready to learn a fresh and beautiful way to look at software and how to have fun building it. The course assumes some prior experience with programming, as described in more detail in the first module. The course is divided into three Coursera courses: Part A, Part B, and Part C. As explained in more detail in the first module of Part A, the overall course is a substantial amount of challenging material, so the three-part format provides two intermediate milestones and opportunities for a pause before continuing. The three parts are designed to be completed in order and set up to motivate you to continue through to the end of Part C. The three parts are not quite equal in length: Part A is almost as substantial as Part B and Part C combined. Week 1 of Part A has a more detailed list of topics for all three parts of the course, but it is expected that most course participants will not (yet!) know what all these topics mean.

From the lesson

Software Installation and Homework 0

This module contains two things: (1) The information for the [unusual] software you need to install for Programming Languages Part A. (2) An optional "fake" homework that you can turn in for auto-grading and peer assessment to get used to the mechanics of assignment turn-in that we will use throughout the course. You can do this module either before or after watching the first few "actual course content" videos in the next module, but you will want to get the software installed soon so you can learn by actively trying out variations on the code in the videos. You will need to install the software to do the homework.

Software Installation Introduction1:22

Emacs installation2:27

SML installation1:47

SML Mode installation3:52

Meet the Instructors

Dan Grossman
Professor
Computer Science & Engineering

All right, now what we're going to do is we're going to get, SML mode for E max

installed, so we've installed the E max and we've installed SML, but now we want

to make E max convenient and useful for both writing and running SML programs. So

we're going to do this entirely from within E max.

So the first thing I'm going to do is open it, just going to type E max here

and run it, you're going to see some slightly different colors here and you're

not going to see the menu bar, that is just formating that I did.

so that it's easier to see on the video. You probably still have a white

background and that's just fine. so now I've opened EMAX.

I'm now going to run a command meta-x list packages.

So on a windows keyboard I'm going to type alt X.

And then type list. Either space, although it'll print as a

dash, or you could type the dash, packages, and hit return.

What that's going to do, if you're in Emax version 24 something or higher, is

bring up a list of packages that are easy to install.

If you have an older version of Emax or you're not connected to the internet,

you're going to have to follow some significantly more complicated

instructions in an older version of SML Mode, and the written instructions do

walk through that. But assuming you got this screen to go

up, you can just scroll down either with your mouse or with your keyboard, down

here to SML dash Mode and then you can just take your mouse and click on that.

That's going to split the screen in two here.

So I'm now seeing two buffers in EMAX, and you can just click on this install

button. It's going to ask if I want to install

it. I clearly do.

And a minute later it says that everything's installed.

Now what I want to do is go ahead and exit Emax with control X, control C.

And then I'm just going to reopen it here.

and bring that. Back over so you can see it and get that

nice big font again. And now we just want to check that we've

done it correctly. We are done installing.

So you want to open an s m l file. Now, you can use control x control f and

then the file name to do this, or if you have a file created, and I'm just

going to create one over here on the desktop.

I'm not going to give it a t x t extension.

I'm going to call it something like test dot s m l.

So I'll get a warning saying do you really want to change the file extension,

and I do. Because when you have something with an s

m l file extension. Emax should now know that it's an SML

file. So I can literally just drag it on to

Emax, and you'll notice down here on the bottom.

The mode line says, I'm add-, editing an SML file.

So, if you write SML code which if you haven't learned how to do yet, something

you will learn how to do soon. Something like Val X= three+4, Val Y= X

times five. You'll see coloring.

We have multiple lines here. You see nice indentation by hitting the

tab key and etcetera. When I want to save the file, I type

control X, control S. Now what if I wanted to run SML.

I'm not going to do that in this buffer but I can do it from within EMAX.

Anytime I'm eding- editing a.SML file I can just type control C control S now.

All I did was type control c control s. What's come up is sml command sml.

Hit return. It's going to split my buffer in two and

now here at the bottom I do have an sml read eval print loop where I could type

one plus one semi-colon and get two. In fact, because I did that, from that

test that SML file, I'm in the same folder directory as I was over there, so

if I want to load the contents of that file, I can say, use, then in quotation

marks, test that SML on semi colon, and indeed it just ran that program, and said

X is seven and Y is 35, so we have everything correctly installed, we can

now use SML, from within E macs, edit are files in there and we're all set with

installation for the first half of the course.

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