Ensemble

Ensemble is a prototype of a distributed, convergent, set-based programming language inspired by APL. Ensemble is build on top of the Lasp epidemic broadcast runtime system for CRDTs.

Running a REPL

You can start a Read-Eval-Print-Loop fairly easily.

$ make shell
[Erlang startup messages]
1> ensemble_repl:start()
Ensemble-(1)>

Operations

Assign a set of values to a variable.

> A <- 1 2 3 4
{1 2 3 4}

Print the value of a variable.

> A
{1 2 3 4}

Map the set contents using a binary function like addition with a value and assign the results to another variable.

> B <- A+1
{2 3 4 5}

Or, try multiplication.

> C <- A*2
{2 4 6 8}

You don't need to assign it either, it can evaluate like any other expression in the language.

> A*2
{2 4 6 8}

Create a new set using the iota operation that will generate a series of values; here, the set of values is from 1 to 10.

> D <- i10
{1 2 3 4 5 6 7 8 9 10}

Semi-colons can also be used to seperate statements on the same line.

> A <- i10; A
{1 2 3 4 5 6 7 8 9 10}

Maybe try computing the Cartesian product.

> A <- i2; B <- i2; A*B
{ (1, 1) (1, 2) (2, 1) (2, 2) }

Then, try the intersection.

> A <- i2; B <- i10; A&B
{ 1 2 }

Or, try the union.

> A <- i2; B <- i5; A|B
{ 1 2 3 4 5 }

How about a fold?

> A <- i5; +/A
15

Coming Soon

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Copyright

Copyright 2016 (c) Christopher S. Meiklejohn.