Carriero - Linda in Context.pdf (by Nicholas Carriero and David Gelernter) found from a tweet by Bret Victor:
indeed, very much inspired by Linda's tuple spaces, with two less-old ideas: tuples as complete sentences (inspired by Inform 7 and @alexwarth ) and tuples located in real physical space (inspired by handwork, Tufte, reality). Both super-important!
Linda is a model of parallel programming where processes write and read from a tuple-space. Linda has four basic operations: eval and out to create new data objects, and in and rd to remove and read them respectively.
For example:
out("a string", 15.01, 17, "another string")
// and to read (find) this tuple
rd("a string", ? i, ? j, "another string")
// how to calculate the fibonacci sequence
fib(i) {
rd("fib", i - 1, ? prev)
rd("fib", i - 2, ? prevprev)
out("fib", i, prev + prevprev)
}
// out("fib", index, value)
out("fib", 0, 0)
out("fib", 1, 1)
for (i = 2; i < 10; i++) {
// eval will create a new process
eval(fib(i))
}
// to store a vector V of n-element
out("V", 1, FirstElement)
out("V", 2, SecondElement)
...
out("V", n, NthElement)
// to change the ith element of the vector
// we first remove it from the tuple space
in("V", i, ? OldValue)
// and then put the new value back
out("V", i, NewValue)I don't know much about parallel programming but it seems interesting. I should check how Go and Clojure are doing it.