useFlatMap

诊断类别：lint/complexity/useFlatMap

¥Diagnostic Category: lint/complexity/useFlatMap

JavaScript (and super languages)

自从：v1.0.0

¥Since: v1.0.0

来源：

¥Sources:

与以下相同：unicorn/prefer-array-flat-map

¥Same as: unicorn/prefer-array-flat-map
与以下相同：map_flatten

¥Same as: map_flatten

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

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

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

  ✖ 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 │

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

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

  ✖ 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

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

useFlatMap

示例

无效

有效

相关链接