JavaScript按条件拆分和合并数组

function splitArrayByCondition(arr, condition) {
  return arr.reduce((acc, curr) => {
    if (condition(curr)) {
      acc.push([curr]); // 创建新的子数组
    } else {
      acc[acc.length - 1].push(curr); // 将当前元素添加到最后一个子数组中
    }
    return acc;
  }, []);
}

// 示例
const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
const evenNumbers = splitArrayByCondition(numbers, num => num % 2 === 0);
console.log(evenNumbers); // [[2, 4, 6, 8, 10]]

function mergeArraysByCondition(arr1, arr2, condition) {
  return condition ? arr1.concat(arr2) : arr1;
}

// 示例
const array1 = [1, 2, 3];
const array2 = [4, 5, 6];
const shouldMerge = true;
const mergedArray = mergeArraysByCondition(array1, array2, shouldMerge);
console.log(mergedArray); // [1, 2, 3, 4, 5, 6]