Ramda.js -如何查看嵌套数组中的许多值

const R = require('ramda');

const nestedArray = [
  { id: 1, details: { name: 'Alice', age: 25 } },
  { id: 2, details: { name: 'Bob', age: 30 } },
  { id: 3, details: { name: 'Charlie', age: 35 } }
];

// 使用 Ramda 查看嵌套数组中的名字
const getNames = R.pipe(
  R.map(R.path(['details', 'name']))
);

console.log(getNames(nestedArray)); // 输出: ['Alice', 'Bob', 'Charlie']

const R = require('ramda');

const nestedArrayWithNulls = [
  { id: 1, details: { name: 'Alice', age: 25 } },
  { id: 2, details: null },
  { id: 3, details: { name: 'Charlie', age: 35 } }
];

const getNamesWithDefault = R.pipe(
  R.map(R.pathOr('Unknown', ['details', 'name']))
);

console.log(getNamesWithDefault(nestedArrayWithNulls)); // 输出: ['Alice', 'Unknown', 'Charlie']