14.1.1 refactor

1-ExpressCalculator_solved_expressCalculator.js

// Dependencies
var express = require("express");

// Create express app instance.
var app = express();

// Routes
app.get("/:operation/:firstNum/:secondNum", function(req, res) {

  // Parameters are received from the URL
  var operation = req.params.operation;

  // Parameters are converted to integers
  var firstNum = parseInt(req.params.firstNum);
  var secondNum = parseInt(req.params.secondNum);
  var result;

  // Switch statement chooses operation based on the operation parameter.
  switch (operation) {
    case "add":
      result = firstNum + secondNum;
      break;
    case "subtract":
      result = firstNum - secondNum;
      break;
    case "multiply":
      result = firstNum * secondNum;
      break;
    case "divide":
      result = firstNum / secondNum;
      break;
    default:
      result = "Sorry! The only valid operations are add, subtract, multiply, and divide.";
  }

  // We return the result back to the user in the form of a string
  res.send(result.toString());

});

// Initiate the listener.
app.listen(3002);

1-ExpressCalculator_solved_package.json

{
  "name": "expresscalculator",
  "version": "1.0.0",
  "description": "",
  "main": "ExpressCalculator.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.15.2",
    "express": "^4.14.0"
  }
}

1-ExpressCalculator_unsolved_expressCalculator.js

// Dependencies
var express = require("express");

// Create express app instance.
var app = express();

// Routes
//What routes do you need to have? Which ones are optional?
//TODO Add your routes here
app.get("", function(req, res) {

    //TODO parse out the variables from the request
    // Parameters are received from the URL
    //TODO make sure they're converted to integers (and not strings)
    // Parameters are converted to integers

    //Initialize the result variable to send later
    var result;
    // Switch statement chooses operation based on the operation parameter.
    switch (operation) {
        //BONUS - How could you use * + etc. inside the app.get()?
        case "add":
            //Add your logic here. Pun intended.
            break;
        case "subtract":
            //Subtract logic
            break;
        case "multiply":
            //Multiply
            break;
        case "divide":
            //Divide
            break;
        default:
            //Handle anything that isn't specified
            result =
                "Sorry! The only valid operations are add, subtract, multiply, and divide.";
    }

    // We return the result back to the user in the form of a string
    res.send(result.toString());

});

// Initiate the listener.
app.listen(3002);

1-ExpressCalculator_unsolved_package.json

{
  "name": "expresscalculator",
  "version": "1.0.0",
  "description": "",
  "main": "ExpressCalculator.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.15.2",
    "express": "^4.14.0"
  }
}