add json to csv conversion tutorial

nodejs/json-to-csv/.gitignore

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+.gradle
+/build/
+!gradle/wrapper/gradle-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### Node ###
+node_modules
+
+# Extras
+/uploads/

nodejs/json-to-csv/README.md

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+# How to convert JSON to CSV in Node.js
+
+For step-by-step instructions, please visit the [blog post](https://attacomsian.com/blog/nodejs-convert-json-to-csv).

nodejs/json-to-csv/app-async.js

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+// require json-2-csv module
+const converter = require('json-2-csv');
+const fs = require('fs');
+
+// read JSON from a file
+const todos = JSON.parse(fs.readFileSync('todos.json'));
+
+// convert JSON array to CSV string
+(async () => {
+    try {
+        const csv = await converter.json2csvAsync(todos);
+
+        // print CSV string
+        console.log(csv);
+
+        // write CSV to a file
+        fs.writeFileSync('todos.csv', csv);
+
+    } catch (err) {
+        console.log(err);
+    }
+})();

nodejs/json-to-csv/app-file.js

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+// require json-2-csv module
+const converter = require('json-2-csv');
+const fs = require('fs');
+
+// read JSON from a file
+const todos = JSON.parse(fs.readFileSync('todos.json'));
+
+// convert JSON array to CSV string
+converter.json2csv(todos, (err, csv) => {
+    if (err) {
+        throw err;
+    }
+
+    // print CSV string
+    console.log(csv);
+
+    // write CSV to a file
+    fs.writeFileSync('todos.csv', csv);
+
+});

nodejs/json-to-csv/app-promise.js

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+// require json-2-csv module
+const converter = require('json-2-csv');
+const fs = require('fs');
+
+// read JSON from a file
+const todos = JSON.parse(fs.readFileSync('todos.json'));
+
+// convert JSON array to CSV string
+converter.json2csvAsync(todos).then(csv => {
+
+    // print CSV string
+    console.log(csv);
+
+    // write CSV to a file
+    fs.writeFileSync('todos.csv', csv);
+
+}).catch(err => console.log(err));

nodejs/json-to-csv/app.js

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+// require json-2-csv module
+const converter = require('json-2-csv');
+const fs = require('fs');
+
+// declare a JSON array
+const todos = [
+    {
+        "id": 1,
+        "title": "delectus aut autem",
+        "completed": false
+    },
+    {
+        "id": 2,
+        "title": "quis ut nam facilis et officia qui",
+        "completed": false
+    },
+    {
+        "id": 3,
+        "title": "fugiat veniam minus",
+        "completed": false
+    }];
+
+// Convert JSON array to CSV string
+converter.json2csv(todos, (err, csv) => {
+    if (err) {
+        throw err;
+    }
+
+    // print CSV string
+    console.log(csv);
+
+    // write CSV to a file
+    fs.writeFileSync('todos.csv', csv);
+
+});

nodejs/json-to-csv/package.json

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+{
+  "name": "json-to-csv",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "json-2-csv": "^3.6.2"
+  }
+}

nodejs/json-to-csv/todos.csv

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+id,title,completed
+1,delectus aut autem,false
+2,quis ut nam facilis et officia qui,false
+3,fugiat veniam minus,false

nodejs/json-to-csv/todos.json

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+[{
+        "id": 1,
+        "title": "delectus aut autem",
+        "completed": false
+    },
+    {
+        "id": 2,
+        "title": "quis ut nam facilis et officia qui",
+        "completed": false
+    },
+    {
+        "id": 3,
+        "title": "fugiat veniam minus",
+        "completed": false
+    }
+]