使用 javascript 简化对象计算

你可以这样称呼getSum

var answer = getSum(obj, 'Test');
console.log(answer);
function getSum(data, key){
    var sprints = data[key][0];
    var sum = 0;
    for (var sprint in sprints){
         if(sprints[sprint]){
              sum += sprints[sprint];
         }
    }
    return sum;
}

并得到所有总数

 var total = 0;
 for (var key in obj){
      total += getSum(onj, key);
 }
console.log(total);

如果你只想添加一些特定的冲刺值，那么你需要传递一个这些冲刺名称的列表，比如

function getSum(data, key, sprintNames){
    var sprints = data[key][0];
    var sum = 0;
    sprintNames.forEach(function(name){
        if(sprints[name]){
              sum += sprints[name]
         }
    });
    return sum;
}
getSum(obj, 'Design', ['Sprint_2', 'Sprint_3']);

假设您只想汇总该 JSON 中的所有非空值，这里有一个简单的 for 循环解决方案： https://jsfiddle.net/vgpw4h1h/1/

var sum = 0;
for (status in obj) {
  for (project in obj[status]) {
    for (sprint in obj[status][project]) {
      sum += obj[status][project][sprint];
    }
  }
}
console.log('Points from all sprints: ' + sum);

首先，数据结构很重要。结合评论部分的所有建议和我自己的经验，我建议将数据结构化如下。

// Your JavaScript Object
var backlog = {
    Open: [
        null, null, null,
        6, 38, 7
    ],
    Design: [
        null, null, null,
        null, 1, null
    ],
    Requirement: [
        null, null, null,
        1, 1, null
    ],
    Ready_for_Build: [
        null, null, null,
        4, 2, null
    ],
    Build: [
        null, null, null,
        12, 1, null
    ],
    Ready_for_Test: [
        null, null, null,
        4, 4, null
    ],
    Test: [
        null, null, null,
        5, 6, null
    ],
    Ready_for_Acceptance: [
        null, null, null,
        3, null, null
    ],
    Accepted: [
        38, 43, 57,
        19, null, null
    ],
    Total_Bugs: [
        47, 39, 71,
        39, null, null
    ],
    Bugs_Success: [
        37, 25, 42,
        11, null, null
    ],
    Bugs_In_Progress: [
        null, null, 7,
        4, null, null
    ]
};

首先注意所需的语法字符（{、}、[、]、：、' 和 "）要少得多。这不一定是代码质量的指标，但在这种情况下，它也大大简化了下一组代码。

要获得总和，您可以使用 Array.prototype.reduce() 和 Array.prototype.map() 等函数来迭代数据并以最少的重复执行强大的计算。

// A collection of the stages that you want to add up
var postDevBacklogStages = [
    backlog.Ready_for_Test,
    backlog.Test,
    backlog.Ready_for_Acceptance,
    backlog.Accepted
];
// A helper funnction to find the sum of an array
var sumArray = function (array){
    return array.reduce(function(previousValue, currentValue, currentIndex, array){
    if (typeof(currentValue) != "number") {
        return previousValue;
    } else {
      return previousValue + currentValue;
    }
  });
};
// Finds the sums of the arrays for each stage you want to add up
var postDevBacklogStageSums = postDevBacklogStages.map(function(currentValue, index, array){
    return sumArray(currentValue);
});
// Finds the sum of the sums of stages
var sumTotal = sumArray(postDevBacklogStageSums);
console.log(postDevBacklogStageSums); // [8, 11, 3, 157]
console.log(sumTotal); // 179