This is a collection of M scripts for learning purposes. The examples in this tutorial are run with GT.M.
https://www.isharkfly.com/tag/mumps
7d368b805b
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| 01-the-very-basics | ||
| 02-functions | ||
| 03-utility-routines | ||
| 04-user-defined-functions | ||
| 05-user-defined-routines | ||
| 06-databases | ||
| .editorconfig | ||
| .gitignore | ||
| README.md | ||
README.md
MUMPS Examples
MUMPS ("Massachusetts General Hospital Utility Multi-Programming System"), or M, is a general-purpose computer programming language originally designed in 1966 for the healthcare industry. Its differentiating feature is its "built-in" database, enabling high-level access to disk storage using simple symbolic program variables and subscripted arrays; similar to the variables used by most languages to access main memory. Read more...
The implementations currently available are:
The examples in this tutorial are run with GT.M.
Prerequisites
- GT.M Administration and Operations Guide
- The GT.M Programmer's Guide
- GT.M Message and Recovery Procedures Manual
- MUMPS Technology Portal
Additional Documentation
GPL Mumps
- The Mumps Programming Language
- Mumps Language Users' Guide
- Mumps Language Quick Introduction & Tutorial
Quick Setup
To install GT.M on Debian based OS:
apt-get install fis-gtm
Set up the environment variables:
source /usr/lib/x86_64-linux-gnu/fis-gtm/V6.3-003A_x86_64/gtmprofile
Open the GT.M prompt:
gtm
GTM>write "Hello world"
Hello world
GTM>halt
To uninstall GT.M:
apt-get purge fis-gtm
Run the Examples
Copy the example of your choice into $gtmdir/$gtmver/r:
cp -r <your-folder>/mumps-examples/06-databases/basic-sql-blog/* $gtmdir/$gtmver/r
Or alternatively create a symbolic link:
ln -s <your-folder>/mumps-examples/06-databases/basic-sql-blog/* ~/.fis-gtm/V6.3-003A_x86_64/r
Then run the example:
mumps -run ^Main
1. The Very Basics
HelloWorld.m
Hello world
HelloWorldInLoop.m
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
HelloWorldInAnotherLoop.m
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
HelloWorldInNestedLoop.m
1:1 Hello world
1:2 Hello world
1:3 Hello world
1:4 Hello world
1:5 Hello world
2:1 Hello world
2:2 Hello world
2:3 Hello world
2:4 Hello world
2:5 Hello world
ArithmeticOperations.m
There were 7 apples, 8 pears and 9 oranges,
a total of 24 fruits in a basket.
Then, something happened:
1 apple, 2 pears and 0 oranges were eaten!
Now there are 21 fruits in the basket,
the average fruit value is 7.
Arrays.m
Approaching the solar system:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
September 2019:
26 27 28 29 30 31 1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 1 2 3 4 5 6
Genealogical tree:
Harry and Emily had Jack
Associative array:
Have you ever been to London?
ArraysShortened.m
The output obtained is the same as that in
Arrays.m
2. Functions
Ascii.m
The ASCII code of "a" is 97.
Char.m
Alphabet:
abcdefghijklmnopqrstuvwxyz
Data.m
Genealogical tree:
gtree(1)="Oliver"
gtree(1,1)="James"
gtree(1,1,1)="Harry"
gtree(1,1,1,1,1)="Robert"
gtree(1,1,2)="Emily"
gtree(1,2)="Amelia"
gtree(1,2,1)="Thomas"
gtree(1,2,2)="Jessica"
Data about a few nodes:
$d(gtree("foo")) is 0
$d(gtree(1,1,1,1,1)) is 1
$d(gtree(1,1,1,1)) is 10
$d(gtree(1)) is 11
Extract.m
Original string: Hello world!
Substring: Hello
3. Utility Routines
TODO.
4. User Defined Functions
FactorialByReference.m
Enter n: 5
5! = 120
FactorialByValue.m
Enter n: 5
5! = 120
Fibonacci.m
Enter n: 9
F(9) = 34
5. User Defined Routines
Main.m
Hello!
Enter n: 9
areaCircle(9) = 254.469
fibonacci(9) = 34
factorialByVal(9) = 362880
factorialByRef(9) = 362880
For further details also visit MyMathRoutines.m
6. Databases
basic-sql-crud/Main.m
User successfully created!
User successfully created!
User successfully fetched!
username: alice
email: alice-jones@no-reply.com
fullname: Alice Jones
User successfully updated!
User successfully fetched!
username: amelia
email: amelia-roberts@no-reply.com
fullname: Amelia Roberts
User successfully deleted!
User successfully fetched!
username:
email:
fullname:
Database successfully dropped!
For further details also visit:
basic-sql-blog/Main.m
Category fetched (3):
description: Foobar
Post fetched (1):
slug: lorem-ipsum
title: Lorem ipsum
description: Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
Posts fetched by category (3):
(3,3,2) = curabitur-ullamcorper-ultricies~Curabitur ullamcorper ultricies~Curabitur ullamcorper ultricies nisi.
(4,3,2) = donec-vitae-sapien~Donec vitae sapien~Donec vitae sapien ut libero venenatis faucibus. Nullam quis ante.
Posts fetched by user (1):
(1,1,1) = lorem-ipsum~Lorem ipsum~Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
(2,1,1) = donec-pede-justo~Donec pede justo~Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu.
Comment fetched (1):
description: This is awesome! Thank you.
Database successfully dropped!
For further details also visit:
Contributions
Would you help make this tutorial better? Contributions are welcome.
- Feel free to send a pull request
- Drop an email at info@programarivm.com with the subject "Open MUMPS by Example"
- Leave me a comment on Twitter
- Say hello on Google+
Many thanks.