我不知道这是我对jquery的一点了解,还是它只是一个bug,但下面是发生的情况。我有一小段json代码
{
"planes":[
{
"id":1,
"name":"Boeing 767-300",
"height":54.9 ,
"wingspan":47.6,
"vel": 851,
"vel max":913,
"plane width":283.3,
"weight":86070,
"full weight":158760,
"passengers":{
"1 class":350,
"2 class":269,
"3 class":218
},
"fuel tank":90.625,
"engine":"2 turbofan General Electric CF6-80C2"
},
{
"id":2,
"name":"Boeing 737-800",
"height":33.4 ,
"wingspan":35.8,
"vel": 840,
"vel max":945,
"plane width":105.44,
"weight":32704,
"full weight":56472,
"passengers":{
"1 class":189
},
"fuel tank":90.625,
"engine":"2 turbofan CFM56-3C1"
}
]
}
然后我会用jquery的
getJSON
没有任何瑕疵。然后我想要两个独立的数组:一个保存键,另一个保存值,同样没有问题
Object.keys
和
Object.values
。通过将结果记录在一个字符串中,一切都很好。直到我尝试构造一个关联数组,使用键作为索引,使用值作为数据。通过记录结果,我得到一个值为“0”的额外“length”索引。这是我的jquery代码
var arr=[];
$.getJSON("js/jsondata.json", function(data){
var keys= Object.keys(data.planes[0]);
var values= Object.values(data.planes[0]);
//im only testing on the first object, for now
$.each(keys, function(i){
//creating the associative index and assigning the value
arr[keys[i]]= values[i];
console.log("Key: "+ keys[i]+", Value: "+values[i]);
//this logs the exact values and indexes
});
console.log(arr);
//this logs an extra "length" 0
});