如何将JSON字符串转换为具有对象的数组

Question

我想将以下字符串转换为数组

var myEfficientFn = debounce(function() {
    show();
}, 250);

$(window).on('resize', myEfficientFn);

// Returns a function, that, as long as it continues to be invoked, will not
// be triggered. The function will be called after it stops being called for
// N milliseconds. If `immediate` is passed, trigger the function on the
// leading edge, instead of the trailing.
function debounce(func, wait, immediate) {
    var timeout;
    return function() {
        var context = this, args = arguments;
        var later = function() {
            timeout = null;
            if (!immediate) func.apply(context, args);
        };
        var callNow = immediate && !timeout;
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
        if (callNow) func.apply(context, args);
    };
};

不幸的是，当我[{id: "1", type: "railroadCrossingSign", latitude: "55.647432", longtitude: "12.187673"}, {id: "2", type: "stationSign", latitude: "55.647444", longtitude: "12.187545"}] 时发生错误，可能是因为字符串中的对象......

如何将带对象的JSON字符串转换为带对象的数组？

Answer 1

JSON格式要求您的密钥也必须包含在""。

中

var string = '[{"id": "1", "type": "railroadCrossingSign", "latitude": "55.647432", "longtitude": "12.187673"}, {"id": "2", "type": "stationSign", "latitude": "55.647444", "longtitude": "12.187545"}]';

var arr = JSON.parse(string);

console.log(arr);

Answer 2

为了实现你想要的。 您的JSON键值对也必须采用字符串格式。
说，

var obj = JSON.parse('{ "name":"John", "age":30, "city":"New York"}');
document.getElementById("demo").innerHTML = obj.name + ", " + obj.age;  

最后，当你使用：

 if list is empty then 
  return:
         0;
 else
  return: 
        (first_element + constant*eploy(rest_of_the_elements, constant)

您会收到以下结果：

  

John，30

Answer 3

一些观察结果：

• 首先确保您的JSON应该是有效的JSON。
• 对象属性应包含在引号 "" 。
中

• 如果您的JSON已经是JSON Object，则无需再次parse，否则会引发错误。

＆＃13;

＆＃13;

var jsonObj = [{
	"id": "1",
	"type": "railroadCrossingSign",
	"latitude": "55.647432",
	"longtitude": "12.187673"
}, {
	"id": "2",
	"type": "stationSign",
	"latitude": "55.647444",
	"longtitude": "12.187545"
}];

var newObj = JSON.parse(jsonObj);

console.log(newObj); // Error : Uncaught SyntaxError: Unexpected token o in JSON at position 1

＆＃13;

＆＃13;

＆＃13;