Javascript How to add array with another array into a new array?

Question

So my challenge right now is unable to add array with another array into another new array.

my code:

var disabletimerange = { basedonservicetype: "", basedonservicer: "" }
var arr = [{"StartTime":"09:00:00","EndTime":"09:10:00"},{"StartTime":"10:00:00","EndTime":"15:00:00"}]
for (var xx = 0; xx < arr.length; xx++) {
 var bookedStartTime, bookedEndTime
 bookedStartTime = arr[xx].StartTime.slice(0, -3)
 bookedEndTime = arr[xx].EndTime.slice(0, -3)
 if (disabletimerange.basedonservicer === "") {
 var disabletimealreadybookedtiming = "[" + '"' + bookedStartTime + '"' + "," + '"' + bookedEndTime + '"' + "]"
 disabletimerange.basedonservicer = JSON.parse(disabletimealreadybookedtiming)
 } else {
 var disabletimealreadybookedtiming = "[" + '"' + bookedStartTime + '"' + "," + '"' + bookedEndTime + '"' + "]"
 disabletimerange.basedonservicer = "[" + "[" + disabletimerange.basedonservicer + "]" + "," + disabletimealreadybookedtiming + "]"
 disabletimerange.basedonservicer = JSON.parse(disabletimerange.basedonservicer)
}

Uncaught SyntaxError: Unexpected number in JSON at position 3 --> at the last line it cannot parse.

In short, what i want is basically 2 array stick tgt instead of adding into it

var y = ["hi", "123"]
var x = ["yo", "312"]
this
[["hi", "123"], ["yo", "312"]] instead of ["hi", "123", "yo", "312"]

and it must be array. not text form

Answer 1

You can do:

var y = ["hi", "123"]
var x = ["yo", "312"]
var result = [x, y]
console.log(result)

Answer 2

As you described

How to add array with another array into a new array?

• create a new array

• push your arrays into this new array one by one

let x = [1,2];
let y = [3.4];
let z = [];
z.push(x)
z.push(y);
console.log(z);