Streem examples

[tbodt]

So far, it seems that the only thing anybody knows how to write with Streem is the FizzBuzz and cat programs. Obviously, a language can't be that useful if it can only do FizzBuzz and cat.

Please comment on this issue with your examples of more useful things you can do with Streem. I still need to be convinced that there are any.

[nickserv]

Keep in mind that Streem is in its really early phase of development. As far as I'm aware, not much is implemented yet besides parsing source files. There's still a bit of design discussion going on. That being said, Streem already has a few pretty cool conceptual ideas, like functional programming concepts and sending one stream to multiple consumers.

[alexispurslane]

Heres an idea though:

// Get all usernames from a stream of input data. Assumes my seggestions of currying and prototypal are accepted, as well as my alternative syntax for lambdas.

['username': '', 'age': 0, 'init': (u, a) -> { this.u = u; this.a = a; }] -> User

def ith (n, thing) {
  thing[n]
} // Possible shorthand for: `def ith (n, thing) = thing[n]`, anyone?

ith(0, _) -> get_user

STDIN | split(',', _) | User.init(_, int(_)) | get_user | STDOUT
// The input format could be: Christopher Dumas,22

[s-aida]

If it's premature to add a real-world example, what else?
Fibonacci? Prime Numbers? Or even Hello World?

[nickserv]

Hello World

["Hello, world!"] | STDOUT

[nickserv]

Fibonacci

def fib (n) {
  if n == 0 {
    0
  } else if n == 1 {
    1
  } else {
    fib(n-1) + fib(n-2)
  }
}

seq(10) | fib | STDOUT

This is a fairly naive example in terms of performance, but it should work (hopefully).

Edit: Whoops, this seems to be broken with the current streem parser. Any ideas as to what's wrong?

[shuichiro-makigaki]

Currently, I think you can't write fib (n) {. Instead, fib (n) | {. But, this isn't what you'd like to do...

Is it seq(10) | fib | STDOUT. Or

seq(10) | { |x|
  fib(x)
} | STDOUT

and how do you give functions names. More examples, please.
Is it like in Haskell?

f x y = x * 2 + y * 2
g = f 2
h = g 3
h == 10

[nickserv]

@blkdev Those should both work, Streem should have first class functions.

[matz]

I added some examples in 2dce6a4. More to come.

[tbodt]

@matz They are great examples. Until now, I didn't think of Streem as a language that could do TCP connections. 😎

[nickserv]

@matz Cool! Out of curiousity, does "Hello World" | STDOUT work, or does the left side have to be a list?

[matz]

@nicolasmccurdy it should be a list. I'd like to reserve | for bitwise or.

[nickserv]

So is | going away for pipes?

[alexispurslane]

Maybe we could use '>>' for pipes, and '%' for splitting them.

[Krysl]

This example "05chat.strm" makes me confused:

broadcast = chan()
tcp_server(8008) | {|s|
  broadcast | s   # connect to broadcast channel
  s | broadcast   # broadcast incoming message
}

I'm not sure "broadcast | s" means data came from "s" to "broadcast" or came from "broadcast" to "s".