useFlatMap

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v1.0.0

¥Rule available since: v1.0.0
诊断类别：lint/complexity/useFlatMap

¥Diagnostic Category: lint/complexity/useFlatMap
此规则为推荐规则，默认启用。

¥This rule is recommended, which means is enabled by default.
此规则包含 safe 修复程序。

¥This rule has a safe fix.
此规则的默认严重级别为 information。

¥The default severity of this rule is information.
来源：

¥Sources:
- 与 unicorn/prefer-array-flat-map 相同
  
  ¥Same as unicorn/prefer-array-flat-map
- 与 map_flatten 相同
  
  ¥Same as map_flatten

如何配置

¥How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "complexity": {
5
        "useFlatMap": "error"
6
      }
7
    }
8
  }
9
}

描述

¥Description

提倡在 map().flat() 一起使用时使用 .flatMap()。

¥Promotes the use of .flatMap() when map().flat() are used together.

示例

¥Examples

无效

¥Invalid

1
const array = ["split", "the text", "into words"];
2
array.map(sentence => sentence.split(' ')).flat();

code-block.js:2:1 lint/complexity/useFlatMap  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ The call chain .map().flat() can be replaced with a single .flatMap() call.
  
    1 │ const array = [“split”, “the text”, “into words”];
  > 2 │ array.map(sentence => sentence.split(’ ‘)).flat();
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    3 │ 
  
  ℹ Safe fix: Replace the chain with .flatMap().
  
    1 1 │   const array = [“split”, “the text”, “into words”];
    2   │ - array.map(sentence·=>·sentence.split(’·‘)).flat();
      2 │ + array.flatMap(sentence·=>·sentence.split(’·’));
    3 3 │

1
const array = ["split", "the text", "into words"];
2
array.map(sentence => sentence.split(' ')).flat(1);

code-block.js:2:1 lint/complexity/useFlatMap  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ The call chain .map().flat() can be replaced with a single .flatMap() call.
  
    1 │ const array = [“split”, “the text”, “into words”];
  > 2 │ array.map(sentence => sentence.split(’ ‘)).flat(1);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    3 │ 
  
  ℹ Safe fix: Replace the chain with .flatMap().
  
    1 1 │   const array = [“split”, “the text”, “into words”];
    2   │ - array.map(sentence·=>·sentence.split(’·‘)).flat(1);
      2 │ + array.flatMap(sentence·=>·sentence.split(’·’));
    3 3 │

有效

¥Valid

1
const array = ["split", "the text", "into words"];
2
array.map(sentence => sentence.split(' ')).flat(2);

useFlatMap

摘要

如何配置

描述

示例

无效

有效

相关链接