added example howto use multibars in synchronous context

Author: AndiDittrich

CHANGES.md

@@ -1,5 +1,9 @@
 ## Branch 3.x ##
 
+### 3.9.0 ###
+
+* Added: example howto use multibars in synchronous context
+
 ### 3.8.2 ###
 
 * Bugfix: bar duration not stopped until all bars have finished - thanks to [omjadas on GitHub](https://github.com/AndiDittrich/Node.CLI-Progress/issues/71)

examples/example-synchronous.js

@@ -1,4 +1,4 @@
-var _progress = require('../cli-progress');
+const _progress = require('../cli-progress');
 
 // long running, recursive function (blocking operation)
 // well it's no optimized and not for productive use but it's an easy way to implement a long-running & blocking operation without third-party modules
@@ -10,16 +10,16 @@ function fibonacci(n) {
     }
 }
 
-function run(options, limit){
+function runSinglebar(options, limit){
     // create new progress bar using default values
-    var bar = new _progress.Bar(options);
+    const bar = new _progress.Bar(options);
     bar.start(limit, 1);
 
-    var fibonacciNumbers = [];
+    const fibonacciNumbers = [];
 
     // calculate the Nth fibonacci
     // this loop is executed synchronous - no timer/interval callbacks will be executed
-    for (var i = 1; i <= limit; i++) {
+    for (let i = 1; i <= limit; i++) {
         fibonacciNumbers.push(fibonacci(i));
         bar.update(i);
     }
@@ -30,18 +30,51 @@ function run(options, limit){
     console.log('\nFibonacci (1-', fibonacciNumbers.length,'): ', fibonacciNumbers.join(', '), '\n');
 }
 
+function runMultibar(options, limit){
+    // create new progress bar using default values
+    const multibar = new _progress.MultiBar(options);
+    
+    const bar1 = multibar.create(limit, 1);
+    const bar2 = multibar.create(2124, 541);
+
+    const fibonacciNumbers = [];
+
+    // calculate the Nth fibonacci
+    // this loop is executed synchronous - no timer/interval callbacks will be executed
+    for (let i = 1; i <= limit; i++) {
+        fibonacciNumbers.push(fibonacci(i));
+        bar1.update(i);
+        bar2.increment(89);
+
+        // force redraw 
+        multibar.update();
+    }
+
+    // stop all bars
+    multibar.stop();
+
+    // display the numbers:
+    console.log('\nFibonacci (1-', fibonacciNumbers.length,'): ', fibonacciNumbers.join(', '), '\n');
+}
+
 console.log('\nCalculation without synchronous updates');
-run({
+runSinglebar({
     format: 'Fibonacci Calculation Progress [{bar}] {percentage}% | ETA: {eta}s | Current: F({value})',
     hideCursor: true,
     synchronousUpdate: false
 }, 40);
 
 console.log('\nCalculation WITH synchronous updates');
-run({
+runSinglebar({
     format: 'Fibonacci Calculation Progress [{bar}] {percentage}% | ETA: {eta}s | Current: F({value})',
     hideCursor: true,
     synchronousUpdate: true
 }, 43);
 
 
+console.log('\nMultibar calculation synchronous enforced updates (synchronous mode not available)');
+runMultibar({
+    format: 'Fibonacci Calculation Progress [{bar}] {percentage}% | ETA: {eta}s | Current: F({value})',
+    hideCursor: true
+}, 43);
+