Function as a Service - IT Forum Expo 2017

AWSLambdaCalculator.js

'use strict';
console.log('Loading function');
exports.handler = (event, context, callback) => {
    console.log('JavaScript HTTP trigger function processed a request.');
    if (event.number1 && event.number2 && event.operator) {      
        var number1 = parseFloat(event.number1);
        var number2 = parseFloat(event.number2);
        var operator = event.operator;
        var result = 0;  
        switch (operator)
        {
            case '*': {
                result = number1*number2;
                break;
            }
            case '/': {
                result = number1/number2;
                break;
            }
            case '+': {
                result = number1+number2;
                break;
            }
            case '-': {
                result = number1-number2;
                break;
            }
            default:{
                result = "[Error!!]: Operator '"+operator+"' is not supported yet. Try *, /, + or -.]";
                break;
            }
        }
    }
    else {
        callback(null,"Please pass number1, number2 and the operator");
    }
    callback(null, "result of "+number1+" "+operator+" "+number2+" = "+result); 
};

AzureFunctionsCalculator.js

module.exports = function (context, req) {
    context.log('JavaScript HTTP trigger function processed a request.');
    if (req.query.number1 && req.query.number2 && req.query.operator) {      
        var number1 = parseFloat(req.query.number1);
        var number2 = parseFloat(req.query.number2);
        var operator = req.query.operator;
        var result = 0;
        switch (operator)
        {
            case '*': {
                result = number1*number2;
                break;
            }
            case '/': {
                result = number1/number2;
                break;
            }
            case '+': {
                result = number1+number2;
                break;
            }
            case '-': {
                result = number1-number2;
                break;
            }
            default:{
                result = "[Error!!]: Operator '"+operator+"' is not supported yet. Try *, /, + or -.]";
                break;
            }
        }
        context.res = {
            // status: 200, /* Defaults to 200 */
            body: "result of "+number1+" "+operator+" "+number2+" = "+result
        };
    }
    else {
        context.res = {
            status: 400,
            body: "Please pass number1, number2 and the operator"
        };
    }
    context.done();
};

GoobleCloudFunctionsCalculator.js

exports.calculator = function helloWorld(req, res) {
  console.log('JavaScript HTTP trigger function processed a request.');
    if (req.query.number1 && req.query.number2 && req.query.operator) {      
        var number1 = parseFloat(req.query.number1);
        var number2 = parseFloat(req.query.number2);
        var operator = req.query.operator;   
        var result = 0;   
        switch (operator)
        {
            case '*': {
                result = number1*number2;
                break;
            }
            case '/': {
                result = number1/number2;
                break;
            }
            case '+': {
                result = number1+number2;
                break;
            }
            case '-': {
                result = number1-number2;
                break;
            }
            default:{
                result = "[Error!!]: Operator '"+operator+"' is not supported yet. Try *, /, + or -.]";
                break;
            }
        }     
        var bodyMessage = "result of "+number1+" "+operator+" "+number2+" = "+result;     
    }
    else {
        res.status(400).send("Please pass number1, number2 and the operator");
    }
   res.status(200).send(bodyMessage);
};