JSON.stringify 和 JSON.parse 的区别 [英] Difference between JSON.stringify and JSON.parse
问题描述
我对何时使用这两种解析方法感到困惑.
在我回显我的 json_encoded 数据并通过 ajax 取回它之后,我经常对何时应该使用 JSON.stringify 和 JSON.parse 感到困惑..>
解析时在我的 console.log 中得到 [object,object]
,在字符串化时得到一个 JavaScript 对象.
$.ajax({url: "demo_test.txt",成功:功能(数据){控制台日志(JSON.stringify(数据))/* 或者 */控制台日志(JSON.parse(数据))//这是我不确定的吗?}});
JSON.stringify
将 JavaScript 对象转换为 JSON 文本并将该 JSON 文本存储在字符串中,例如:
var my_object = { key_1: "some text", key_2: true, key_3: 5 };var object_as_string = JSON.stringify(my_object);//"{"key_1":"some text","key_2":true,"key_3":5}"类型(object_as_string);//细绳"
JSON.parse
将一串 JSON 文本转换为 JavaScript 对象,例如:
var object_as_string_as_object = JSON.parse(object_as_string);//{key_1: "some text", key_2: true, key_3: 5}类型(object_as_string_as_object);//目的"
I have been confused over when to use these two parsing methods.
After I echo my json_encoded data and retrieve it back via ajax, I often run into confusion about when I should use JSON.stringify and JSON.parse.
I get [object,object]
in my console.log when parsed and a JavaScript object when stringified.
$.ajax({
url: "demo_test.txt",
success: function(data) {
console.log(JSON.stringify(data))
/* OR */
console.log(JSON.parse(data))
//this is what I am unsure about?
}
});
JSON.stringify
turns a JavaScript object into JSON text and stores that JSON text in a string, eg:
var my_object = { key_1: "some text", key_2: true, key_3: 5 };
var object_as_string = JSON.stringify(my_object);
// "{"key_1":"some text","key_2":true,"key_3":5}"
typeof(object_as_string);
// "string"
JSON.parse
turns a string of JSON text into a JavaScript object, eg:
var object_as_string_as_object = JSON.parse(object_as_string);
// {key_1: "some text", key_2: true, key_3: 5}
typeof(object_as_string_as_object);
// "object"
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