Interacting with a DB or reading a html file from disk is in essence non-pure. | Hacker News

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PeterisP on Oct 6, 2013 | parent | context | favorite | on: Your server as a function [pdf]

Interacting with a DB or reading a html file from disk is in essence non-pure.

pka on Oct 7, 2013 [–]

[1] is a good simple explanation of what FRP is about. A DB interaction for example can be viewed as a pure function from a signal of Requests to a signal of Records. Same with files (Signal Path -> Signal FileContents), etc.

[1] http://elm-lang.org/learn/What-is-FRP.elm

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