给定数组 和 间距 计算 平均值得算法

gistfile1.txt

function calAVG(array, interval){

  if(!(Array.isArray(array))) throw '参数异常'

  for(let ele of array){
    if(isNaN(parseFloat(ele))){
      throw '数组中有不能转换为数字的元素'
    }
  }

  const result = [],
        INTERVAL = interval || 1,
        reducer = (accumulator, currentValue) => accumulator + currentValue;
  let arrayLength = array.length;
  if(arrayLength <= interval){
    console.info(array.reduce(reducer))
    result.push(array.reduce(reducer)/arrayLength);
    return result;
  }

 for(let[index, value] of array.entries()){
    let endIndex = index + INTERVAL,
        currentArray = array.slice(index, endIndex + 1);

    if(endIndex >= arrayLength){
      result.push(currentArray.reduce(reducer)/(currentArray.length))
      break;
    }
    result.push(currentArray.reduce(reducer)/(INTERVAL + 1));
 }
  return result;
}