intentation

async-await/0_callbacks.js

@@ -1,31 +1,30 @@
 // https://javascript.info/callbacks
 
-entryPoint();
+entryPoint()
 
 function entryPoint () {
-  
   execute_action('something', function (error, time_of_completion) {
     if (error) {
-        console.log('Something happened');
+      console.log('Something happened')
     } else {
-        console.log('Time of completion: ' + new Date(time_of_completion).toDateString());
-      }
-    });
-    console.log("I don't need execute_action's value");
+      console.log('Time of completion: ' + new Date(time_of_completion).toDateString())
     }
+  })
+  console.log("I don't need execute_action's value")
+}
 
-  function execute_action (param, callback) {
+function execute_action (param, callback) {
   if (param == 'something') {
-      console.log('Executing action: ' + param);
-      callback(null, Date.now());
+    console.log('Executing action: ' + param)
+    callback(null, Date.now())
   } else {
     // We can call callback with one argument even if
     // the signature states two parameters.
-      callback(new Error('Invalid parameter'));
-    }
+    callback(new Error('Invalid parameter'))
   }
+}
 
-  /*
+/*
     This is useful when, for example, execute_action performs slow operations
     (such as I/O, HTTP requests etc) and we need its result to continue a
     specific operation (in this case the date of completion), without blocking
@@ -54,4 +53,3 @@ function entryPoint () {
     constructs.
 
   */
-  

async-await/1_promises.js

@@ -18,8 +18,8 @@
     callback function, but with many additional features and a more readable syntax.
 */
 const promise = new Promise(function (resolve, reject) {
-  setTimeout(() => resolve('done'), 5000);
-});
+  setTimeout(() => resolve('done'), 5000)
+})
 
 /*
     The first argument of .then is a function that runs when the promise is resolved and receives the result.
@@ -29,14 +29,14 @@ const promise = new Promise(function (resolve, reject) {
 promise.then(
   result => console.log('The operation was successful. It returned ' + result),
   error => console.log('The operation was not successful: ' + error)
-);
+)
 
 /*
   Or we can pass only one argument if we're interested only in a positive result
 */
 promise.then(
   result => console.log('The operation was successful. It returned ' + result)
-);
+)
 
 /*
     Or we can pass only one argument to the method "catch" if we're interested
@@ -46,17 +46,17 @@ promise.then(
 */
 promise.catch(
   error => console.log(error)
-);
+)
 
 /*
   finally gets always called
 */
 promise.finally(
   () => console.log('The execution has terminated. Bye')
-);
+)
 
 /*
   This line is used to demonstrate that the code within "then, catch, etc."
   is in the event loop, as this is the first line getting executed.
 */
-console.log("Last line");
+console.log('Last line')

async-await/2_promise-chaining.js

@@ -4,26 +4,26 @@
 // internally calling resolve().
 
 new Promise(function (resolve, reject) {
-    setTimeout(() => resolve(1), 1);
-  }).then(function (result) {
-    console.log(result);
-    return result * 2;
-  }).then(function (result) {
-    console.log(result);
-    return result * 2;
-  }).then(function (result) {
-    console.log(result);
-    return result * 2;
-  });
+  setTimeout(() => resolve(1), 1)
+}).then(function (result) {
+  console.log(result)
+  return result * 2
+}).then(function (result) {
+  console.log(result)
+  return result * 2
+}).then(function (result) {
+  console.log(result)
+  return result * 2
+})
 
-  /*
+/*
       It will print
       1
       2
       4
   */
 
-  /*
+/*
     It means that "then" is internally implemented roughly as follows:
 
     function then(f){
@@ -33,16 +33,16 @@ new Promise(function (resolve, reject) {
     }
   */
 
-  // Another example:
+// Another example:
 
-  fetch('http://www.fsf.org')
-    // .then below runs when the remote server responds
+fetch('http://www.fsf.org')
+// .then below runs when the remote server responds
   .then(function (response) {
     // response.text() returns a new promise that resolves with the full response text
     // when it loads
-      return response.text();
+    return response.text()
   })
   .then(function (text) {
     // ...and here's the content of the remote file
-      console.log(text);
-    });
+    console.log(text)
+  })

async-await/3_async-await.js

@@ -4,10 +4,10 @@
 // Async and await are merely syntactic sugar in order to make Promise usage easier
 
 async function f1 () {
-    return 1;
+  return 1
 }
 
-f1().then(console.log); // 1
+f1().then(console.log) // 1
 
 // The keyword await makes JavaScript wait until that promise settles and returns its result.
 // It can be used in async functions only.
@@ -15,12 +15,12 @@ f1().then(console.log); // 1
 // and then resumes it with the promise result.
 async function f2 () {
   const promise = new Promise((resolve, reject) => {
-    setTimeout(() => resolve('done!'), 1000);
-  });
-  const result = await promise; // wait until the promise resolves (*)
-  console.log(result); // "done!"
+    setTimeout(() => resolve('done!'), 1000)
+  })
+  const result = await promise // wait until the promise resolves (*)
+  console.log(result) // "done!"
 }
-f2();
+f2()
 
 // The code in the same function after "await"
 // is to be intended in the "then()" of the primise. This means
@@ -28,15 +28,15 @@ f2();
 // the flow of execution goes out that code block. For example
 // consider the following example:
 async function exampleAsyncFunction () {
-  console.log('Before await');
+  console.log('Before await')
   await new Promise(function (resolve, reject) {
-    setTimeout(() => resolve('done'), 500);
-  }); // Pauses execution here until the promise resolves.
-  console.log('After await');
+    setTimeout(() => resolve('done'), 500)
+  }) // Pauses execution here until the promise resolves.
+  console.log('After await')
 }
-console.log('Start');
-exampleAsyncFunction();
-console.log('End');
+console.log('Start')
+exampleAsyncFunction()
+console.log('End')
 
 // The result will be:
 //  Start, Before Await, End, After await