A React calculator

Built to play around with React, and also the create-react-app module, which can be found at https://github.com/facebookincubator/create-react-app/blob/master/template/README.md

See deployed version of this product at https://calculator-react.herokuapp.com/

Feedback appreciated! My Github username is ethanjfriedman.

What this project is

A simple pocket calculator, built in React.

TO DO

• Continue refactoring
• Add in better style management with Radium
• Redux for state management?
• Add in floating point arithmetic
• Add in ability to operate in non-base 10 arithmetic
• Add in memory (M+, MR, MC keys)
• Add in clear button
• Add in 'repeat previous operation' ability by repeatedly pressing equal sign (so that 3 + 5 = = will result in 13)
• Add in better parsing to avoid various errors if impossible key combos are pressed
• Add in button that reveals additional operators such as:
  • trig operations (sin, cos, tan, etc.)
  • scientific notation
  • log and ln
  • square root
  • x^2
  • others?
• Add in button to copy result to clipboard

UPDATE 8/3/2016

• also added in keys for π, e, xʸ ...
• added in static Express server! To serve:
  • run npm run build to generate the build for deployment (in ./build)
  • run npm start to serve it up!
• changed the prior start script to start-dev: to start the app in development mode (with hot reloading, etc.), run npm run start-dev.

UPDATE 8/4/2016

• We have a decimal point! For extra precision, all calculations are done as integers until the end (the display however shows the decimal point).
• Fixed deployment error (create-react-app had automatically added in the build/ directory to the .gitignore -- grrr).
• Minor styling
• Minor refactoring
• Added in tooltips on operation keys
• Cannot find square root, ln, or log of a negative number
• TODO: fix handling decimals with leading zero

UPDATE 8/8/2016

• Copy to clipboard added (using module react-copy-to-clipboard).