Question

我是Javascript和JSON的新手。我想通过Javascript获取以下JSON值。我需要检索＆＃34;登录＆＃34;价值并加上＆＃34; a＆＃34;，＆＃34; d＆＃34;和＆＃34; c＆＃34;分别。我设法得到了＃34;登录＆＃34;价值，但我无法弄清楚如何检索＆＃34; a＆＃34;，＆＃34; d＆＃34;和＆＃34; c＆＃34;值。

 var data = JSON.parse(text);
 $.each(data, function(i, v) {
     var login = v.login;    // Get "login"
     var commits = 0;
     var additions = 0;
     var deletions = 0;
     var contributions = 0;

     $.each(data, function(j, w) {
         commits += w.c;      // Get "c"
         additions += w.a;    // Get "a"
         deletions += w.d;    // Get "d"
     });
 });

JSON：

[
  {
    "total": 2,
    "weeks": [
      {
        "w": 1214092800,
        "a": 0,
        "d": 0,
        "c": 0
      },
      {
        "w": 1474761600,
        "a": 0,
        "d": 0,
        "c": 0
      },
      {
        "w": 1476576000,
        "a": 0,
        "d": 0,
        "c": 0
      }
    ],
    "author": {
      "login": "ramiro"
    }
  }
]

Answer 1

您可以使用数组方法map和reduce。 jQuery并不是必需的。

var retrieved = data.map(function(v) {
  var ret = v.weeks.reduce(function(a, b) {
    return {
      a: a.a + b.a,
      d: a.d + b.d,
      c: a.c + b.c
    }
  })
  ret.login = v.author.login
  return ret
})

Answer 2

试试这个会起作用：

JSON：

var data = [
  {
    "total": 2,
    "weeks": [
      {
        "w": 1214092800,
        "a": 0,
        "d": 0,
        "c": 0
      },
      {
        "w": 1474761600,
        "a": 0,
        "d": 0,
        "c": 0
      },
      {
        "w": 1476576000,
        "a": 0,
        "d": 0,
        "c": 0
      }
    ],
    "author": {
      "login": "ramiro"
    }
  }
];

<强> 1。用于循环

var weekData = data[0].weeks; 
for (var i in weekData) {
 console.log(data[0].weeks[i].a,data[0].weeks[i].d,data[0].weeks[i].c);
}

<强> 2。使用数组映射方法

var weekData = data[0].weeks; 

var returnData = weekData.map(function(e) {
return {
          a: e.a,
          d: e.d,
          c: e.c
        }
})

console.log(returnData);

工作小提琴： https://jsfiddle.net/ry49dz61/1/

从Javascript中检索JSON对象值

2 个答案: