[Haskell-cafe] ANN: engineering-units-0.0.1

[Carter Schonwald]

neat! Thanks for sharing. Seems like it'll be handy for sanity checking
physics ideas before writing the fancy realizations


On Tue, Mar 11, 2014 at 12:30 PM, Tom Hawkins <tomahawkins at gmail.com> wrote:

> Hi,
>
> I just uploaded a handy library for managing engineering units.  It
> provides a Num type that allows you to mix units into calculations.  It
> also converts between units automatically and will error out if you try to
> mix values with inconsistent units.
>
> Here's an example that computes the horsepower of a hydraulic pump (power
> = pressure * flow):
>
>   flow = 20 * gpm            -- Gallons per minute.
>   pressure = 3000 * psi  -- Pounds per square inch.
>   power = pressure * flow
>
>   powerHP = value power hp     -- Get the value in horsepower.
>   powerKW = value power kw    -- Get the value in Kilowatts.
>
> If you don't see your units in the library, it's easy to add new ones:
>
>   mm :: Value
>   mm = 0.001 * m
>
> Wish I had this back in college.
>
> -Tom
>
> http://hackage.haskell.org/package/engineering-units
>
>
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