Refactor eslint rules

Author: Philipp Alferov

.eslintrc

@@ -2,14 +2,31 @@ root: true
 
 env:
   node: true
-  es6: true
   mocha: true
 
-ecmaFeatures:
-  modules: true
-
 extends:
   "eslint:recommended"
 
-globals:
-  should: true
+rules:
+  array-bracket-spacing: [2, "never"]
+  block-scoped-var: 2
+  brace-style: [2, "1tbs"]
+  camelcase: 1
+  curly: 2
+  eol-last: 2
+  eqeqeq: [2, "smart"]
+  indent: [2, 2, { "SwitchCase": 1 }]
+  max-depth: [1, 3]
+  max-len: [1, 80]
+  max-statements: [1, 15]
+  new-cap: 1
+  no-extend-native: 2
+  no-mixed-spaces-and-tabs: 2
+  no-trailing-spaces: 2
+  no-unused-vars: 1
+  no-use-before-define: [2, "nofunc"]
+  object-curly-spacing: [2, "never"]
+  quotes: [2, "single", "avoid-escape"]
+  semi: [2, "always"]
+  space-after-keywords: [2, "always"]
+  space-unary-ops: 2

index.js

@@ -41,7 +41,8 @@ var groupByParents = function(array, options) {
 
 /**
  * arrayToTree
- * Convert a plain array of nodes (with pointers to parent nodes) to a nested data structure
+ * Convert a plain array of nodes (with pointers to parent nodes) to a nested
+ * data structure
  *
  * @name arrayToTree
  * @function