Change functions to lambdas

Author: tshemsedinov

JavaScript/3-callback.js

@@ -1,16 +1,6 @@
 'use strict';
 
-function cloneInterface(anInterface) {
-  const clone = {};
-  let key, fn;
-  for (key in anInterface) {
-    fn = anInterface[key];
-    clone[key] = wrapFunction(fn);
-  }
-  return clone;
-}
-
-function wrapFunction(fn) {
+const wrapFunction = fn => {
   console.log('Wrap function: ' + fn.name);
   return (...args) => {
     console.log('Called wrapper for: ' + fn.name);
@@ -33,7 +23,17 @@ function wrapFunction(fn) {
     console.dir({ result });
     return result;
   };
-}
+};
+
+const cloneInterface = anInterface => {
+  const clone = {};
+  let key, fn;
+  for (key in anInterface) {
+    fn = anInterface[key];
+    clone[key] = wrapFunction(fn);
+  }
+  return clone;
+};
 
 // Usage
 

JavaScript/4-wrap-api.js

@@ -1,16 +1,6 @@
 'use strict';
 
-function cloneInterface(anInterface) {
-  const clone = {};
-  let key, fn;
-  for (key in anInterface) {
-    fn = anInterface[key];
-    clone[key] = wrapFunction(fn);
-  }
-  return clone;
-}
-
-function wrapFunction(fn) {
+const wrapFunction = fn => {
   console.log('Wrap function: ' + fn.name);
   return (...args) => {
     console.log('Called wrapper for: ' + fn.name);
@@ -20,7 +10,17 @@ function wrapFunction(fn) {
     console.dir({ result });
     return result;
   };
-}
+};
+
+const cloneInterface = anInterface => {
+  const clone = {};
+  let key, fn;
+  for (key in anInterface) {
+    fn = anInterface[key];
+    clone[key] = wrapFunction(fn);
+  }
+  return clone;
+};
 
 // Usage
 

JavaScript/5-timeout.js

@@ -2,7 +2,7 @@
 
 // Wrapper will prevent call after timeout
 
-function timeout(msec, fn) {
+const timeout = (msec, fn) => {
   let timer = setTimeout(() => {
     if (timer) console.log('Function timedout');
     timer = null;
@@ -14,7 +14,7 @@ function timeout(msec, fn) {
       return fn(...args);
     }
   };
-}
+};
 
 // Usage
 

JavaScript/6-timeout-async.js

@@ -2,7 +2,7 @@
 
 // Wrapper will prevent call after timeout
 
-function timeout(msec, fn) {
+const timeout = (msec, fn) => {
   let timer = setTimeout(() => {
     if (timer) console.log('Function timedout');
     timer = null;
@@ -14,7 +14,7 @@ function timeout(msec, fn) {
       return fn(...args);
     }
   };
-}
+};
 
 // Usage
 

JavaScript/b-optimzed.js

@@ -15,7 +15,7 @@ const wrap = (func) => {
       return;
     }
     const res = fn(...args);
-    counter++
+    counter++;
     return res;
   };