Question

我写了一个JavaScript函数来查找奇数的数量，负整数的数量，平均值和中值。

代码正在完成我想要的所有内容，但是，我想知道我是否可以重写它以使函数返回对象而不仅仅是控制台日志值。我还包含了一个指向我的JS Bin（https://jsbin.com/digagozuru/edit?html,css,js,console,output）

的链接

任何建议或意见将不胜感激！感谢。

  var arrayAnalyzer = function(myArray) {

    var odds = 0;
    var negatives = 0;
    var avg;
    var median;

    for (var i = 0; i < myArray.length; i++) {
      if (myArray[i] % 2 !== 0) {
        odds += 1;
      }
      if (myArray[i] < 0) {
        negatives += 1;
      }
    }

    console.log("There are " + odds + " odd numbers.");
    console.log("There are " + negatives + " negative numbers.");

    var sum = myArray.reduce(function(previousValue, currentValue) {
      return previousValue + currentValue;
    });

    avg = sum / myArray.length;
    console.log("The average is " + avg.toFixed(2));

    var orderedArray = myArray.sort(function(a, b) {
      return a - b;
    });

    if (orderedArray.length % 2 === 0) {
      var position1 = orderedArray.length / 2;
      var position2 = position1 - 1;
      median = (orderedArray[position1] + orderedArray[position2]) / 2;
    } else {
      var position = Math.floor(orderedArray.length / 2);
      median = orderedArray[position];
    }

    console.log("The median is " + median);
  };

  arrayAnalyzer([7, -3, 0, 12, 44, -5, 3]);

Answer 1

var arrayAnalyzer = function(myArray) {

  var odds = 0;
  var negatives = 0;
  var avg;
  var median;

  for (var i = 0; i < myArray.length; i++) {
    if (myArray[i] % 2 !== 0) {
      odds += 1;
    }
    if (myArray[i] < 0) {
      negatives += 1;
    }
  }

  console.log("There are " + odds + " odd numbers.");
  console.log("There are " + negatives + " negative numbers.");

  var sum = myArray.reduce(function(previousValue, currentValue) {
    return previousValue + currentValue;
  });

  avg = sum / myArray.length;
  console.log("The average is " + avg.toFixed(2));

  var orderedArray = myArray.sort(function(a, b) {
    return a - b;
  });

  if (orderedArray.length % 2 === 0) {
    var position1 = orderedArray.length / 2;
    var position2 = position1 - 1;
    median = (orderedArray[position1] + orderedArray[position2]) / 2;
  } else {
    var position = Math.floor(orderedArray.length / 2);
    median = orderedArray[position];
  }

  console.log("The median is " + median);
  // Returns an object with named attributes
  return {
    odds:odds,
    negatives:negatives,
    avg:avg,
    median:median
  };
};

var myArray = arrayAnalyzer([7, -3, 0, 12, 44, -5, 3]);
console.log("Odds: " + myArray.odds +
  "\nNegatives: " + myArray.negatives +
  "\nAverage:" + myArray.avg +
  "\nMedian: " + myArray.median);

Answer 2

我不确定我的问题是否正确，但为什么不在方法的开头创建一个对象，然后在计算它们后立即在对象中写入值？

var arrayAnalyzer = function(myArray) {

  var odds = 0;
  var negatives = 0;
  var avg;
  var median;
  var result = {};

  for (var i = 0; i < myArray.length; i++) {
    if (myArray[i] % 2 !== 0) {
      odds += 1;
    }
    if (myArray[i] < 0) {
      negatives += 1;
    }
  }

  result.negatives = negatives;
  result.odds = odds;

  var sum = myArray.reduce(function(previousValue, currentValue) {
    return previousValue + currentValue;
  });

  avg = sum / myArray.length;
  result.avg = avg;

  var orderedArray = myArray.sort(function(a, b) {
    return a - b;
  });

  if (orderedArray.length % 2 === 0) {
    var position1 = orderedArray.length / 2;
    var position2 = position1 - 1;
    median = (orderedArray[position1] + orderedArray[position2]) / 2;
  } else {
    var position = Math.floor(orderedArray.length / 2);
    median = orderedArray[position];
  }

  result.median = median;
  return result;
};
console.log(arrayAnalyzer([7, -3, 0, 12, 44, -5, 3]));

如何返回对象而不是控制台日志值

2 个答案: