javascript使用自定义键合并两个数组

function mergeArraysByKey(arr1, arr2, key) {
  return arr1.reduce((result, obj) => {
    const foundObj = arr2.find(item => item[key] === obj[key]);
    if (foundObj) {
      result.push(Object.assign({}, obj, foundObj));
    }
    return result;
  }, []);
}

const array1 = [{ id: 1, name: 'John' }, { id: 2, name: 'Jane' }];
const array2 = [{ id: 1, age: 25 }, { id: 2, age: 30 }];
const mergedArray = mergeArraysByKey(array1, array2, 'id');
console.log(mergedArray);

function mergeArraysByKey(arr1, arr2, key) {
  return arr1.map(obj => {
    const foundObj = arr2.find(item => item[key] === obj[key]);
    return foundObj ? { ...obj, ...foundObj } : obj;
  });
}

const array1 = [{ id: 1, name: 'John' }, { id: 2, name: 'Jane' }];
const array2 = [{ id: 1, age: 25 }, { id: 2, age: 30 }];
const mergedArray = mergeArraysByKey(array1, array2, 'id');
console.log(mergedArray);

function mergeArraysByKey(arr1, arr2, key) {
  const mergedArray = [];
  arr1.forEach(obj1 => {
    arr2.forEach(obj2 => {
      if (obj1[key] === obj2[key]) {
        mergedArray.push(Object.assign({}, obj1, obj2));
      }
    });
  });
  return mergedArray;
}

const array1 = [{ id: 1, name: 'John' }, { id: 2, name: 'Jane' }];
const array2 = [{ id: 1, age: 25 }, { id: 2, age: 30 }];
const mergedArray = mergeArraysByKey(array1, array2, 'id');
console.log(mergedArray);