harryxp / MortgageCalc

Mortgage Calculator in Haskell.

This demonstrates how a command line interface and a web interface can share the same Haskell library.

See ghcjs-playground for general instructions for setting up a ghcjs project.

Standalone (command line):

cd standalone
stack setup

stack build
stack exec MortgageCalc
stack exec MortgageCalc -- -v 400000 4.5 30
stack exec MortgageCalc -- 400000 4.5 30

Web:

cd web
stack setup

stack build
cp .stack-work/dist/x86_64-linux/Cabal-1.24.2.0_ghcjs/build/MortgageCalc/MortgageCalc.jsexe/*js dist/
open index.html     # generated JS files are referenced by index.html

Link to the calculator.

TODO:

• There's a small difference between results calculated by Haskell and JavaScript compiled from Haskell.
• A checkbox to toggle whether to calculate amortization for the web version.
• Error handling.