Question

我如何把新的价值观推向以下阵列?

json = {"cool":"34.33","alsocool":"45454"}

I tried json.push("coolness":"34.33");, but it didn t work.

Answer 1

它不是一个阵列。

var json = {"cool":"34.33","alsocool":"45454"};
json.coolness = 34.33;

or

var json = {"cool":"34.33","alsocool":"45454"};
json[ coolness ] = 34.33;

你可以把它作为一个阵列来,但会是一个不同的集团(这几乎肯定不是你想要的东西)。

var json = [{"cool":"34.33"},{"alsocool":"45454"}];
json.push({"coolness":"34.33"});

请注意,这一可变名称令人非常误导,因为there is no JSON here。我将把它称作其他东西。

Answer 2

var array = new Array(); // or the shortcut: = []
array.push ( {"cool":"34.33","also cool":"45454"} );
array.push (  {"cool":"34.39","also cool":"45459"} );

页: 1

你可以做到:

var o = {}; // or the longer form: = new Object()
o.SomeNewProperty = "something";
o["SomeNewProperty"] = "something";

以及

var o = { SomeNewProperty: "something" };
var o2 = { "SomeNewProperty": "something" };

后来,你在座标上添加这些物体:array.push(o, o2);。

此外,/code>只是对 j物体的描述性表述,因此:

var json =  {"cool":"34.33","alsocool":"45454"} ; // is JSON
var o = JSON.parse(json); // is a javascript object
json = JSON.stringify(o); // is JSON again

Answer 3

这是一个目标,而不是一个阵列。因此,你将:

var json = { cool: 34.33, alsocool: 45454 };
json.supercool = 3.14159;
console.dir(json);

Answer 4

object["property"] = value;

或

object.property = value;

Java的标语和阿雷尔语在使用上有所不同。如果你理解,最好:

Object vs Array: JavaScript

Answer 5

使用https://developer.mozilla.org/en-US/docs/Web/Java/Reference/Global_Objects/Array/push"rel=“nofollow”>push()功能,与阵列对应:

// initialize array
var arr = [
    "Hi",
    "Hello",
    "Bonjour"
];

// append new value to the array
arr.push("Hola");

现在阵列

var arr = [
    "Hi",
    "Hello",
    "Bonjour"
    "Hola"
];

// append multiple values to the array
arr.push("Salut", "Hey");

现在阵列

var arr = [
    "Hi",
    "Hello",
    "Bonjour"
    "Hola"
    "Salut"
    "Hey"
];

// display all values
for (var i = 0; i < arr.length; i++) {
    console.log(arr[i]);
}

页: 1

Hi
Hello
Bonjour
Hola 
Salut
Hey

<>Update>

If you want to add the items of one array to another array, you can use Array.concat:

var arr = [
    "apple",
    "banana",
    "cherry"
];

arr = arr.concat([
    "dragonfruit",
    "elderberry",
    "fig"
]);

console.log(arr);

Will print

["apple", "banana", "cherry", "dragonfruit", "elderberry", "fig"]

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