javascript - 从 JSON 文件在 JavaScript 中创建数组

Question

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，但它不起作用。有人可以帮忙吗？

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

我将此数组用于显示目的(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，如下所示:

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" }
        ]
    } );
} );

Answer 1

你得到一个对象数组，你想要一个数组的数组，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]);
});