Merge pull request #10 from aina21/nodejs_Week3

Nodejs week3

nodejs/week3/calculator/.gitignore

@@ -0,0 +1,2 @@
+.DS_Store
+node_modules

nodejs/week3/calculator/index.js

@@ -0,0 +1,61 @@
+var express = require("express");
+var app = express();
+
+app.get("/calculator/add", (req, res) => {
+  const numbers = [];
+  for (const key in req.query) {
+    if (req.query.hasOwnProperty(key)) {
+      numbers.push(Number(req.query[key]));
+    }
+  }
+  const result = numbers.reduce((sub, num) => {
+    return sub + num;
+  }, 0);
+  res.send(`${result}`);
+});
+
+app.get("/calculator/multiply", (req, res) => {
+  const numbers = [];
+  for (const key in req.query) {
+    if (req.query.hasOwnProperty(key)) {
+      numbers.push(Number(req.query[key]));
+    }
+  }
+  const result = numbers.reduce((multiply, num) => {
+    return multiply * num;
+  }, 1);
+  console.log(`${result}`);
+  res.send(`${result}`);
+});
+
+app.get("/calculator/sub", (req, res) => {
+  const numbers = [];
+  for (const key in req.query) {
+    if (req.query.hasOwnProperty(key)) {
+      numbers.push(Number(req.query[key]));
+    }
+  }
+  const result = numbers.reduce((sub, num) => {
+    return num - sub;
+  }, 0);
+  res.send(`${result}`);
+});
+
+app.get("/calculator/div", (req, res) => {
+  const numbers = [];
+  for (const key in req.query) {
+    if (req.query.hasOwnProperty(key)) {
+      numbers.push(Number(req.query[key]));
+    }
+  }
+
+  const result = numbers.reduce((div, num) => {
+    //console.log(num , div)
+    div = num / div;
+    return div;
+  }, 1);
+
+  res.send(`${result}`);
+});
+
+app.listen(3000);