How can I add an array into another array in Javascript?

Question

I have an two element array looking like this

headers = [{x: 1, y: 2},{x: 2, y: 3}]

I have another three element array that looks like:

ans = [{r: true},{r: false},{r:true}]

How can I add the second array to the first row of the first array to give:

[{x: 1, y: 2, ans: [{r: true},{r: false},{r:true}] },{x: 2, y: 3}]

Note that I don't want to define ans beforehand as it could be an array or something else. Also sorry but I think my representation of the array might not be quite the correct syntax. Hope it makes sense.

Answer 1

You actually want to add another property to an element in an array. You can do it like this

 headers[0].ans = ans;

Answer 2

只需将属性分配给对象： headers[0].ans = ans

Answer 3

You could do something like this...

var headers = [{x: 1, y: 2},{x: 2, y: 3}];
var ans = [{r: true},{r: false},{r:true}];

// define what you want the newly added property to be called
var collectionName = "ans";

// assign it only to the first item in the headers array
headers[0][collectionName] = ans;

// here are your results
console.log(JSON.stringify(headers));

here is a working fiddle that will output the array for you to look at in an output div

http://jsfiddle.net/9KR2P/

Answer 4

var headers = [{x: 1, y: 2},{x: 2, y: 3}],
    ans = [{r: true},{r: false},{r:true}];

headers[0].ans = ans;