My slides from the Great British Node Conference 2013 at Shoreditch Village Hall in London.

2.  Essentially, programs that can be created by
themselves.
 We’re twisting the term a little for streams
 We will be defining streaming constructs using
streaming constructs
 By streams I mean beams which are just streams and
pipes for compute as opposed to IO

3. Any info? Please contact #nodeland police at @cianomaidin on twitter…

4.  Readable Streams
 IO / throughput oriented
 Events – data, end, error, close
 Methods – pause, resume, end, destroy
 Writeable Streams
 IO / throughput oriented
 Events - drain, pause, resume, error, close
 Methods – write, end, destroy

5.  IO Oriented
 Finite, not infinite
 Asynchronous
 Lazy
 Assumes in transit data, not in memory forms
 Great for IO. Not efficient for compute

8.  Sources
 Where data pours in
 Sinks
 Where results pop out
 Operators
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Filters – Drop or pass on data based on a UDF
Transforms – Mutate data based on a UDF
Branch with Filters
Combine with Sinks

9.  Compute Oriented
 Infinite, not finite
 Synchronous
 Eager
 Assumes in memory form, not encoded or wire data
 Convenient for compute. Not good for IO

15.  Eager: a.pipe(operation).pipe(z).pipe(a);
 Implies:
RangeError: Maximum call stack size exceeded

18.  npm install beam
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Compute oriented streams
Branch, Combine, Filter, Transform data
Extend with goto and modules.
 npm install eep
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Beam will be integrated into eep soon
Eep provides aggregate windows
Slide, Tumble, Monotonic, Periodic
Stats Library
Ordering now supported
 npm install nodesapiens

Robosapiens V1 for node.js
 Code on github

https://github.com/darach