从JSON文件在JavaScript中创建数组

时间:2015-08-07 19:41:39

标签: javascript arrays json

我的JSON文件:

[{"val0":"Paul","val1":"Jake","val2":null,"val3":"Max"},
 {"val0":"Sam","val1":"Tina","val2":"Emily","val3":"Hardwell"},
 {"val0":"Tom","val1":"Julie","val2":null,"val3":"Adi"}]

我想在javascript中创建一个数组,如下所示:

var dataSet=[
  ['Paul','Jake','null','Max'],
  ['Sam','Tina','Emily','Harwell'],
  ['Tom','Julie','null','Adi']
];

我尝试了以下代码,但它无效。有人可以帮忙吗?

$.getJSON("filename.json", function(data) {
  var items = [];
  $.each(data, function(key, val) {
    items.push(val);
  });
  // …
});

我正在使用这个数组用于显示目的(使用DataTables),因此,我想以该格式创建数组。我使用dataSet数组在DataTables中显示如下:

var dataSet = [
    ['Paul','Jake','Isha','Mike','null','null','Parth','Tinker'],
    ['Tina','Michael','null','Blue','Red','','Emily','Mina']
];

$(document).ready(function() {
    $('#demo').html( '<table cellpadding="0" cellspacing="0" border="0" class="display" id="example"></table>' );
    $('#example').dataTable( {
        "data": dataSet,
        "columns": [
            { "title": "Name" },
            { "title": "Deadline" },
            { "title": "Additional fees" },
            { "title": "Requirements" },
            { "title": "Field" },
            { "title": "Award" },
            { "title": "Renewable requirements"},
            { "title": "Link" }
        ]
    } );
} );

4 个答案:

答案 0 :(得分:1)

没有jquery的解决方案:

var data = [
        { "val0": "Paul", "val1": "Jake", "val2": null, "val3": "Max" },
        { "val0": "Sam", "val1": "Tina", "val2": "Emily", "val3": "Hardwell" },
        { "val0": "Tom", "val1": "Julie", "val2": null, "val3": "Adi" }
    ],
    dataSet = data.reduce(function (r, a) {
        var i, a0 = [];
        for (i in a) {
            a0.push(a[i]);
        }
        r.push(a0);
        return r;
    }, []);
document.getElementById('out').innerHTML = JSON.stringify(dataSet, null, 4);
<pre id="out"></pre>

答案 1 :(得分:0)

你得到一个对象数组,并且你想要一个数组数组,所以通过读取对象的属性将每个对象转换为数组:

var items = [];
$.each( data, function( key, val ) {
  items.push([val.val0,val.val1,val.val2,val.val3]);
});

答案 2 :(得分:0)

试试这个

<script>
  $(function() {

    $.getJSON("filename.json", function(data) {
      var items = [];
      $.each(data, function(key, val) {

          var tmp = [];
          for (var Key in val) {
            tmp.push(val[Key]);
          }

        items.push(tmp);
      });
      console.log(items);
    });

  });

答案 3 :(得分:0)

一个班轮:

var dataSet = rawData.map(function(e){ return Object.keys(e).map(function(i){ return e[i]}); })

输出:

Creating an array in JavaScript from JSON file

输出为JSON:

enter image description here

方法说明(来自Javascript参考)

  1. map()方法创建一个新数组,其结果是在此数组中的每个元素上调用提供的函数。

  2. Object.keys()方法返回给定对象自己的可枚举属性的数组