从 json 阵列中移除元素

Question

I have a Json file which i am using to store data but i can't remove something from it without it putting "null," where that element was. I've seen people using splice but it doesn't work for me. This is what happens when i use splice

The code i used was delete JsonObj.Times[index] and JsonObj.Times.splice(index, 1)

Input

{
    "Times": [
        {
            "TimeStamp": "1588516643",
            "PremiumTime": "1",
            "ID": "473873947895897",
            "GuildID": "27823978489723789"
        },
        {
            "TimeStamp": "1588516643",
            "PremiumTime": "1",
            "ID": "473873947895897",
            "GuildID": "27823978489723789"
        }
    ]
}

What It Does

[
  {
    "TimeStamp": "1588516643",
    "PremiumTime": "1",
    "ID": "473873947895897",
    "GuildID": "27823978489723789"
  }
]

What I Want

{
    "Times": [
        {
            "TimeStamp": "1588516643",
            "PremiumTime": "1",
            "ID": "473873947895897",
            "GuildID": "27823978489723789"
        }
    ]
}

When i use delete it does what i want but puts null or undefined in the array.

Answer 1

If you want to use splice() , you can do something like this:

 const obj = { "Times": [ { "TimeStamp": "1588516643", "PremiumTime": "1", "ID": "473873947895897", "GuildID": "27823978489723789" }, { "TimeStamp": "1588516643", "PremiumTime": "2", "ID": "473873947895897", "GuildID": "27823978489723789" } ] } const res = obj.Times.splice(0, 1); console.log(obj);

splice()

Answer 2

If you know where the indexed values are going to end up, or are trying to target first/last values, you can also use the common array manipulation methods, .shift() , or .pop() .

Answer 3

If I correctly understand, you want to delete a determination element from Times's array.

Let say you have a variable that contains JSON data. It means that you can not have access to the data that are storing the variable because it is of type string.

const jsonData = "{
"Times": [
    {
        "TimeStamp": "1588516643",
        "PremiumTime": "1",
        "ID": "473873947895897",
        "GuildID": "27823978489723789"
    },
    {
        "TimeStamp": "1588516643",
        "PremiumTime": "1",
        "ID": "473873947895897",
        "GuildID": "27823978489723789"
    }
  ]
 }"

Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse

First of all, you have to parse JSON data using JSON.parse() that will convert the data to a JavaScript value or object described by the string. This will allow you to interact with this data.

let parsedData = JSON.parse(jsonData)

It will create a new variable with parsed data and it contains an object with an array of objects inside of it.

parsedData = {
Times: [
    {
        "TimeStamp": "1588516643",
        "PremiumTime": "1",
        "ID": "473873947895897",
        "GuildID": "27823978489723789"
    },
    {
        "TimeStamp": "1588516643",
        "PremiumTime": "1",
        "ID": "473873947895897",
        "GuildID": "27823978489723789"
    }
  ]
 }

Second, we will remove the element by index from Times's array that are declared inside our object parsedData.

parsedData.Times.split(index,1) 

Where: first parameter "index": The index at which to start changing the array. second parameter "1": An integer indicating the number of elements in the array to remove from the start.

Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice

Hope this can help you!