docs: add config examples for all rules

Author: freaktechnik

README.md

@@ -5,26 +5,34 @@
 Rules for Array functions and methods.
 
 ## Contents
+
 - [Installation](#installation)
 - [Rules](#rules)
   - [`from-map`](#from-map)
     - [Examples](#examples)
+    - [Using the rule](#using-the-rule)
   - [`no-unnecessary-this-arg`](#no-unnecessary-this-arg)
     - [Checked Functions](#checked-functions)
     - [Checked Methods](#checked-methods)
     - [Examples](#examples-1)
+    - [Using the rule](#using-the-rule-1)
   - [`prefer-array-from`](#prefer-array-from)
     - [Examples](#examples-2)
+    - [Using the rule](#using-the-rule-2)
   - [`avoid-reverse`](#avoid-reverse)
     - [Examples](#examples-3)
+    - [Using the rule](#using-the-rule-3)
   - [`prefer-flat-map`](#prefer-flat-map)
     - [Examples](#examples-4)
+    - [Using the rule](#using-the-rule-4)
   - [`prefer-flat`](#prefer-flat)
     - [Examples](#examples-5)
+    - [Using the rule](#using-the-rule-5)
 - [Configurations](#configurations)
   - [`array-func/recommended` Configuration](#array-funcrecommended-configuration)
     - [Using the Configuration](#using-the-configuration)
   - [`array-func/all` Configuration](#array-funcall-configuration)
+    - [Using the Configuration](#using-the-configuration-1)
 - [License](#license)
 
 ## Installation
@@ -44,21 +52,25 @@ $ npm install -D eslint-plugin-array-func
 ## Rules
 
 ### `from-map`
+
 Prefer using the `mapFn` callback of `Array.from` over an immediate `.map()` call on the `Array.from` result.
 
 `Array.from` has a `mapFn` callback that lets you map the items of the iterable to an array like you would with `.map()` except that values have not yet been truncated to fit types allowed in an array. Some iterables can't be directly converted to an array and thus have to be iterated either way. In that case using the mapping callback of `Array.from` avoids an iteration. See also [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from#Description) for an explanation of the potential benefits of using the mapping callback of `Array.from` directly.
 
 This rule is auto fixable. It will produce nested function calls if you use the `Array.from` map callback and have a `.map()` call following it.
 
 #### Examples
+
 Code that triggers this rule:
+
 ```js
 Array.from(iterable).map((t) => t.id);
 
 Array.from(iterable, (t) => t.id).map((id) => id[0]);
 ```
 
 Code that doesn't trigger this rule:
+
 ```js
 Array.from(iterable, (t) => t.id);
 
@@ -68,17 +80,37 @@ const arr = Array.from(iterable);
 const mappedArray = arr.map((t) => t.id);
 ```
 
+#### Using the rule
+
+To use this rule, your `.eslintrc.json` should at least contain the following (may look different for other config file styles):
+
+```json
+{
+  "plugin": [
+    "array-func"
+  ],
+  "rules": {
+    "array-func/array-from": "error"
+  }
+}
+```
+
+Alternatively you can use a [configuration](#configurations) included with this plugin.
+
 ### `no-unnecessary-this-arg`
+
 Avoid the `this` parameter when providing arrow function as callback in array functions.
 
 The `this` parameter is useless when providing arrow functions, since the `this` of arrow functions can not be rebound, thus the parameter has no effect.
 
 The fix is usually to omit the parameter. The Array methods can't be auto-fixed, since the detection of array methods is not confident enough to know that the method is being called on an array.
 
 #### Checked Functions
+
 - `from` (fixable)
 
 #### Checked Methods
+
 - `every`
 - `filter`
 - `find`
@@ -88,7 +120,9 @@ The fix is usually to omit the parameter. The Array methods can't be auto-fixed,
 - `some`
 
 #### Examples
+
 Code that triggers this rule:
+
 ```js
 const array = Array.from("example", (char) => char.charCodeAt(0), this);
 
@@ -108,6 +142,7 @@ array.forEach((char) => console.log(char), this);
 ```
 
 Code that doesn't trigger this rule:
+
 ```js
 const array = Array.from("example", (char) => char.charCodeAt(0));
 const alternateArray = Array.from("example", function(char) {
@@ -135,21 +170,42 @@ array.forEach(function(char) {
 array.filter(this.isGood, this);
 ```
 
+#### Using the rule
+
+To use this rule, your `.eslintrc.json` should at least contain the following (may look different for other config file styles):
+
+```json
+{
+  "plugin": [
+    "array-func"
+  ],
+  "rules": {
+    "array-func/no-unnecessary-this-arg": "error"
+  }
+}
+```
+
+Alternatively you can use a [configuration](#configurations) included with this plugin.
+
 ### `prefer-array-from`
+
 Use `Array.from` instead of `[...iterable]`.
 See [`from-map`](#from-map) for additional benefits `Array.from` can provide over the spread syntax.
 
 This rule is auto fixable.
 
 #### Examples
+
 Code that triggers this rule:
+
 ```js
 const iterable = [..."string"];
 
 const arrayCopy = [...iterable];
 ```
 
 Code that doesn't trigger this rule:
+
 ```js
 const array = [1, 2, 3];
 
@@ -160,7 +216,25 @@ const arrayCopy = Array.from(array);
 const characterArray = Array.from("string");
 ```
 
+#### Using the rule
+
+To use this rule, your `.eslintrc.json` should at least contain the following (may look different for other config file styles):
+
+```json
+{
+  "plugin": [
+    "array-func"
+  ],
+  "rules": {
+    "array-func/prefer-array-from": "error"
+  }
+}
+```
+
+Alternatively you can use a [configuration](#configurations) included with this plugin.
+
 ### `avoid-reverse`
+
 Avoid reversing the array and running a method on it if there is an equivalent
 of the method operating on the array from the other end.
 
@@ -169,14 +243,17 @@ There are two operations with such equivalents: `reduce` with `reduceRight`.
 This rule is auto fixable.
 
 #### Examples
+
 Code that triggers this rule:
+
 ```js
 const string = array.reverse().reduce((p, c) => p + c, '');
 
 const reverseString = array.reverse().reduceRight((p, c) => p + c, '');
 ```
 
 Code that doesn't trigger this rule:
+
 ```js
 const reverseString = array.reduce((p, c) => p + c, '');
 
@@ -187,21 +264,42 @@ const reverseArray = array.reverse();
 const reverseMap = array.reverse().map((r) => r + 1);
 ```
 
+#### Using the rule
+
+To use this rule, your `.eslintrc.json` should at least contain the following (may look different for other config file styles):
+
+```json
+{
+  "plugin": [
+    "array-func"
+  ],
+  "rules": {
+    "array-func/avoid-reverse": "error"
+  }
+}
+```
+
+Alternatively you can use a [configuration](#configurations) included with this plugin.
+
 ### `prefer-flat-map`
+
 Use `.flatMap()` to flatten an array and map the values instead of using
 `.flat().map()`.
 
 This rule is auto fixable.
 
 #### Examples
+
 Code that triggers this rule:
+
 ```js
 const flattenedAndMapped = array.map((p) => p).flat();
 
 const flatWithDefaultDepth = array.map((r) => r).flat(1);
 ```
 
 Code that doesn't trigger this rule:
+
 ```js
 const oneAction = array.flatMap((m) => m);
 
@@ -216,7 +314,25 @@ const flatMappedWithExtra = array.map((r) => r + 1).reverse().flat();
 const flatWithDepth = array.map((p) => p).flat(99);
 ```
 
+#### Using the rule
+
+To use this rule, your `.eslintrc.json` should at least contain the following (may look different for other config file styles):
+
+```json
+{
+  "plugin": [
+    "array-func"
+  ],
+  "rules": {
+    "array-func/prefer-flat-map": "error"
+  }
+}
+```
+
+Alternatively you can use a [configuration](#configurations) included with this plugin.
+
 ### `prefer-flat`
+
 Use `.flat()` to flatten an array of arrays. This rule currently recognizes two
 patterns and can replace them with a `.flat()` call:
 
@@ -226,14 +342,17 @@ patterns and can replace them with a `.flat()` call:
 This rule is auto fixable.
 
 #### Examples
+
 Code that triggers this rule:
+
 ```js
 const concatFlat = [].concat(...array);
 
 const reduceFlat = array.reduce((p, n) => p.concat(n), []);
 ```
 
 Code that doesn't trigger this rule:
+
 ```js
 const flattened = array.flat();
 
@@ -242,9 +361,27 @@ const reverseFlat = array.reduce((p, n) => n.concat(p), []);
 const otherReduce = array.reduce((p, n) => n + p, 0);
 ```
 
+#### Using the rule
+
+To use this rule, your `.eslintrc.json` should at least contain the following (may look different for other config file styles):
+
+```json
+{
+  "plugin": [
+    "array-func"
+  ],
+  "rules": {
+    "array-func/prefer-flat": "error"
+  }
+}
+```
+
+Alternatively you can use a [configuration](#configurations) included with this plugin.
+
 ## Configurations
 
 ### `array-func/recommended` Configuration
+
 The recommended configuration will set your parser ECMA Version to 2015, since that's when the Array functions and methods were added.
 
 Rule | Error level | Fixable
@@ -255,7 +392,9 @@ Rule | Error level | Fixable
 `array-func/avoid-reverse` | Error | Yes
 
 #### Using the Configuration
+
 To enable this configuration use the `extends` property in your `.eslintrc.json` config file (may look different for other config file styles):
+
 ```json
 {
   "extends": [
@@ -265,6 +404,7 @@ To enable this configuration use the `extends` property in your `.eslintrc.json`
 ```
 
 ### `array-func/all` Configuration
+
 The recommended configuration does not include all rules, since some Array methods
 were added after ES2015. The all configuration enables all rules the plugin
 contains and sets the ECMA version appropriately.
@@ -278,5 +418,18 @@ Rule | Error level | Fixable
 `array-func/prefer-flat-map` | Error | Yes
 `array-func/prefer-flat` | Error | Yes
 
+#### Using the Configuration
+
+To enable this configuration use the `extends` property in your `.eslintrc.json` config file (may look different for other config file styles):
+
+```json
+{
+  "extends": [
+    "plugin:array-func/all"
+  ]
+}
+```
+
 ## License
+
 The `array-func` plugin is licensed under the [MIT License](LICENSE).