Code style

Author: tshemsedinov

.eslintrc.yml

@@ -0,0 +1,142 @@
+parserOptions:
+  ecmaVersion: 6
+env:
+  node: true
+extends: 'eslint:recommended'
+globals:
+  api: true
+  global: true
+rules:
+  indent:
+    - error
+    - 2
+    - SwitchCase: 1
+      VariableDeclarator:
+        var: 2
+        let: 2
+        const: 3
+      MemberExpression: 1
+  linebreak-style:
+    - error
+    - unix
+  quotes:
+    - error
+    - single
+  semi:
+    - error
+    - always
+  eqeqeq:
+    - error
+    - always
+  no-loop-func:
+    - error
+  strict:
+    - error
+    - global
+  block-spacing:
+    - error
+    - always
+  brace-style:
+    - error
+    - 1tbs
+    - allowSingleLine: true
+  camelcase:
+    - error
+  comma-style:
+    - error
+    - last
+  comma-spacing:
+    - error
+    - before: false
+      after: true
+  eol-last:
+    - error
+  func-call-spacing:
+    - error
+    - never
+  key-spacing:
+    - error
+    - beforeColon: false
+      afterColon: true
+      mode: minimum
+  keyword-spacing:
+    - error
+    - before: true
+      after: true
+      overrides:
+        function:
+          after: false
+  max-len:
+    - error
+    - code: 80
+      ignoreUrls: true
+  max-nested-callbacks:
+    - error
+    - max: 5
+  new-cap:
+    - error
+    - newIsCap: true
+      capIsNew: true
+      properties: true
+  new-parens:
+    - error
+  no-lonely-if:
+    - error
+  no-trailing-spaces:
+    - error
+  no-unneeded-ternary:
+    - error
+  no-whitespace-before-property:
+    - error
+  object-curly-spacing:
+    - error
+    - always
+  operator-assignment:
+    - error
+    - always
+  operator-linebreak:
+    - error
+    - after
+  semi-spacing:
+    - error
+    - before: false
+      after: true
+  space-before-blocks:
+    - error
+    - always
+  space-before-function-paren:
+    - error
+    - never
+  space-in-parens:
+    - error
+    - never
+  space-infix-ops:
+    - error
+  space-unary-ops:
+    - error
+    - words: true
+      nonwords: false
+      overrides:
+        typeof: false
+  no-unreachable:
+    - error
+  no-global-assign:
+    - error
+  no-self-compare:
+    - error
+  no-unmodified-loop-condition:
+    - error
+  no-constant-condition:
+    - error
+    - checkLoops: false
+  no-console:
+    - off
+  no-useless-concat:
+    - error
+  no-useless-escape:
+    - error
+  no-shadow-restricted-names:
+    - error
+  no-use-before-define:
+    - error
+    - functions: false

.gitignore

@@ -1,2 +1,3 @@
 node_modules
 *.log
+.DS_Store

.jshintrc

@@ -0,0 +1,4 @@
+{
+  "esversion": 6,
+  "node": true
+}

1-extract-metadata/filter-metaprogramming.js

@@ -2,7 +2,7 @@
 
 // Data
 //
-let names = [
+const names = [
   'Marcus Aurelius Antoninus Augustus',
   'Darth Vader',
   'Victor Michailovich Glushkov',
@@ -19,7 +19,7 @@ let names = [
 
 // Metadata
 //
-let conditions = {
+const conditions = {
   length: [10, 200],
   contains: 'Mich',
   starts: 'V',
@@ -35,12 +35,12 @@ let conditions = {
 // Metamodel
 //
 function filter(names, conditions) {
-  let operations = {
+  const operations = {
     length:   (s, v) => s.length >= v[0] && s.length <= v[1],
     contains: (s, v) => s.indexOf(v) > -1,
     starts:   (s, v) => s.indexOf(v) === 0,
     ends:     (s, v) => s.slice(-v.length) === v,
-    not:      (s, v) => !check(s,v)
+    not:      (s, v) => !check(s, v)
   };
   function check(s, conditions) {
     let valid = true;

1-extract-metadata/filter-simple.js

@@ -2,7 +2,7 @@
 
 // Data
 //
-let names = [
+const names = [
   'Marcus Aurelius Antoninus Augustus',
   'Darth Vader',
   'Victor Michailovich Glushkov',
@@ -20,7 +20,8 @@ let names = [
 // Logic
 //
 function filter(names) {
-  let result = [], name;
+  const result = [];
+  let name;
   for (let i = 0; i < names.length; i++) {
     name = names[i];
     if (

2-level-up/metametaprogramming.js

@@ -9,7 +9,7 @@ api.request = require('request');
 //
 function duration(s) {
   if (typeof(s) === 'number') return s;
-  let units = {
+  const units = {
     days:    { rx: /(\d+)\s*d/, mul: 86400 },
     hours:   { rx: /(\d+)\s*h/, mul: 3600 },
     minutes: { rx: /(\d+)\s*m/, mul: 60 },
@@ -26,7 +26,7 @@ function duration(s) {
 
 // Metadata
 //
-let tasks = [
+const tasks = [
   { interval: 5000, get: 'http://127.0.0.1/api/method1.json', save: 'file1.json' },
   { interval: '8s', get: 'http://127.0.0.1/api/method2.json', put: 'http://127.0.0.1/api/method4.json', save: 'file2.json' },
   { interval: '7s', get: 'http://127.0.0.1/api/method3.json', post: 'http://127.0.0.1/api/method5.json' },
@@ -41,11 +41,11 @@ function iterate(tasks) {
 
   // Metamodel configuration metadata
   //
-  let sources = {
+  const sources = {
     get:  api.request.get,
     load: api.fs.createReadStream
   };
-  let destinations = {
+  const destinations = {
     save: api.fs.createWriteStream,
     post: api.request.post,
     put:  api.request.put
@@ -56,9 +56,13 @@ function iterate(tasks) {
   function closureTask(task) {
     return () => {
       console.dir(task);
-      let key, verb, source, destination;
-      for (key in sources) if (task[key]) source = sources[key](task[key]);
-      for (key in destinations) if (task[key]) source.pipe(destinations[key](task[key]));
+      let key, source;
+      for (key in sources) {
+        if (task[key]) source = sources[key](task[key]);
+      }
+      for (key in destinations) {
+        if (task[key]) source.pipe(destinations[key](task[key]));
+      }
     };
   }
   for (let i = 0; i < tasks.length; i++) {

2-level-up/metaprogramming.js

@@ -10,22 +10,22 @@ api.request = require('request');
 function duration(s) {
   let result = 0;
   if (typeof(s) === 'string') {
-    let days    = s.match(/(\d+)\s*d/),
-        hours   = s.match(/(\d+)\s*h/),
-        minutes = s.match(/(\d+)\s*m/),
-        seconds = s.match(/(\d+)\s*s/);
+    const days    = s.match(/(\d+)\s*d/);
+    const hours   = s.match(/(\d+)\s*h/);
+    const minutes = s.match(/(\d+)\s*m/);
+    const seconds = s.match(/(\d+)\s*s/);
     if (days)    result += parseInt(days[1]) * 86400;
     if (hours)   result += parseInt(hours[1]) * 3600;
     if (minutes) result += parseInt(minutes[1]) * 60;
     if (seconds) result += parseInt(seconds[1]);
-    result = result * 1000;
-  } if (typeof(s) === 'number') result = s;
+    result *= 1000;
+  } else if (typeof(s) === 'number') result = s;
   return result;
 }
 
 // Metadata
 //
-let tasks = [
+const tasks = [
   { interval: 5000, get: 'http://127.0.0.1/api/method1.json', save: 'file1.json' },
   { interval: '8s', get: 'http://127.0.0.1/api/method2.json', put: 'http://127.0.0.1/api/method4.json', save: 'file2.json' },
   { interval: '7s', get: 'http://127.0.0.1/api/method3.json', post: 'http://127.0.0.1/api/method5.json' },

4-class-factory/class-inheritance-metaprogramming.js

@@ -16,7 +16,7 @@ Ground.prototype.calculateCost = function(price) {
 //
 function inheritGround(mixin) {
 
-  let DescendantGround = function(area) {
+  const DescendantGround = function(area) {
     this.constructor.apply(this, arguments);
     this.isEmpty = parseInt(area) <= 0;
   };
@@ -34,7 +34,7 @@ function inheritGround(mixin) {
 
 // Create descendant class dynamically
 //
-let LandOwnership = inheritGround({
+const LandOwnership = inheritGround({
   category: 'land',
   type: 'ownership',
   // Add method to descendant class prototype
@@ -45,6 +45,6 @@ let LandOwnership = inheritGround({
 
 // Create and use instance
 //
-let land = new LandOwnership(50);
+const land = new LandOwnership(50);
 console.dir(land);
 console.log('Cost is: ' + land.calculateCost(7) + ' for ' + land.toString());

4-class-factory/class-inheritance-simple.js

@@ -36,6 +36,6 @@ LandOwnership.prototype.toString = function(price) {
 
 // Create and use instance
 //
-let land = new LandOwnership(50);
+const land = new LandOwnership(50);
 console.dir(land);
 console.log('Cost is: ' + land.calculateCost(7) + ' for ' + land.toString());