Optimize examples

Author: tshemsedinov

JavaScript/1-context.js

@@ -1,15 +1,15 @@
 'use strict';
 
-function hash() {
+const hash = () => {
   const data = {};
   let counter = 0;
-  return function(key, value) {
+  return (key, value) => {
     data[key] = value;
     counter++;
     console.dir({ counter });
     return data;
   };
-}
+};
 
 const h1 = hash();
 h1('name', 'Marcus');

JavaScript/2-chain.js

@@ -1,6 +1,6 @@
 'use strict';
 
-function hash() {
+const hash = () => {
   const data = {};
   Object.defineProperty(data, 'add', {
     enumerable: false,
@@ -10,7 +10,7 @@ function hash() {
     }
   });
   return data;
-}
+};
 
 console.dir(
   hash()

JavaScript/3-closure.js

@@ -1,11 +1,13 @@
 'use strict';
 
-function add(x) {
-  return function(y) {
-    const z = x + y;
-    console.log(x + '+' + y + '=' + z);
-    return z;
-  };
-}
-
-add(3)(6);
+const add = x => y => {
+  const z = x + y;
+  console.log(x + '+' + y + '=' + z);
+  return z;
+};
+
+// const add = x => y => x + y;
+
+const res = add(3)(6);
+
+console.log(res);

JavaScript/4-closure-recursive.js

@@ -1,12 +1,10 @@
 'use strict';
 
-function add(x) {
-  return function(y) {
-    const z = x + y;
-    console.log(x + '+' + y + '=' + z);
-    return add(z);
-  };
-}
+const add = x => y => {
+  const z = x + y;
+  console.log(x + '+' + y + '=' + z);
+  return add(z);
+};
 
 // const add = x => y => add(x + y);
 
@@ -16,4 +14,8 @@ const a3 = a2(3);
 const a4 = a1(1);
 const a5 = a2(10);
 
-add(1)(4)(8)(8);
+console.log(a1, a2, a3, a4, a5);
+
+const res = add(1)(4)(8)(8);
+
+console.log(res);

JavaScript/5-logger.js

@@ -1,12 +1,12 @@
 'use strict';
 
-function logger(level) {
+const logger = level => {
   const color = logger.colors[level] || logger.colors.info;
-  return function(s) {
+  return s => {
     const date = new Date().toISOString();
     console.log(color + date + '\t' + s);
   };
-}
+};
 
 logger.colors = {
   warning: '\x1b[1;33m',

JavaScript/6-functor.js

@@ -1,14 +1,12 @@
 'use strict';
 
-function add(x) {
-  const f = function(y) {
+const add = x => {
+  const f = y => {
     const z = x + y;
     console.log(x + '+' + y + '=' + z);
     return add(z);
   };
-  f.map = function(fn) {
-    return fn(x);
-  };
+  f.map = fn => fn(x);
   return f;
 }
 

JavaScript/7-functor-min.js JavaScript/7-functor-short.jsJavaScript/7-functor-min.js renamed to JavaScript/7-functor-short.js

@@ -1,9 +1,9 @@
 'use strict';
 
-function add(x) {
+const add = x => {
   const f = y => add(x + y);
   f.map = fn => fn(x);
   return f;
-}
+};
 
 add(2)(7)(1).map(console.log);