Why do you need to mutate things in order to write a program? Operational progra... | Hacker News

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		jbri on July 22, 2013 \| parent \| context \| favorite \| on: Haskell Lenses In Pictures Why do you need to mutate things in order to write a program? Operational programming may have damaged your brain. (With regards to lenses, note that: This isn't mutating anything, and it's not a metaprogramming "hack" either. Functions as first-class entities instead of opaque blobs of code is one of the big wins of functional programming.)

marshray on July 23, 2013 [–]

> Why do you need to mutate things in order to write a program?

To change the state of the universe from one in which my program is not written to one where it is.

Furthermore, if the program I write mutates nothing upon execution there is no point in running it.

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