node.js - basic

nodejs/package-example/index.js

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+const randomColor = require('randomcolor');
+
+console.log(randomColor());

nodejs/package-example/package-lock.json

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+{
+  "name": "package-example",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "package-example",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "randomcolor": "^0.6.2"
+      }
+    },
+    "node_modules/randomcolor": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/randomcolor/-/randomcolor-0.6.2.tgz",
+      "integrity": "sha512-Mn6TbyYpFgwFuQ8KJKqf3bqqY9O1y37/0jgSK/61PUxV4QfIMv0+K2ioq8DfOjkBslcjwSzRfIDEXfzA9aCx7A=="
+    }
+  },
+  "dependencies": {
+    "randomcolor": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/randomcolor/-/randomcolor-0.6.2.tgz",
+      "integrity": "sha512-Mn6TbyYpFgwFuQ8KJKqf3bqqY9O1y37/0jgSK/61PUxV4QfIMv0+K2ioq8DfOjkBslcjwSzRfIDEXfzA9aCx7A=="
+    }
+  }
+}

nodejs/package-example/package.json

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+{
+  "name": "package-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "randomcolor": "^0.6.2"
+  }
+}

nodejs/practice2/calc.js

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+const add = (a, b) => a + b;
+const sub = (a, b) => a - b;
+
+module.exports = {
+  moduleName: "calc module",
+  add: add, 
+  sub: sub,
+}

nodejs/practice2/index.js

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+const calc = require("./calc");
+
+console.log(calc.add(3, 4));
+console.log(calc.sub(10, 4));