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How can I create an array from an input string using JavaScript?

Currently I have a PHP page returning some values. The data is something like this:
08-30-2018, in
08-29-2018, out
08-28-2018, in
08-27-2018, in
How can I create a custom array in Javascript with the values above to be similar as this array below:
var system = [
['08-30-2018', 'in'],
['08-29-2018', 'out'],
['08-28-2018', 'in'],
['08-27-2018', 'in']
];
I have tried array.push, but it does not create an array like above.
What should I do? Can you help me? Thank you!

You can use multi-dimensional arrays in JavaScript
var system = [];
var output = "08-30-2018, in\n08-29-2018, out\n08-28-2018, in\n08-27-2018, in";
var items = output.split("\n");
for(i=0; i<items.length; i++){
var data = items[i].split(",");
var item = [];
item.push(data[0].trim());
item.push(data[1].trim());
system.push(item);
}
console.log(system);

You could also parse this kind of input using regular expressions:
const input = '08-30-2018, in\n08-29-2018, out\n08-28-2018, in\n08-27-2018, in';
const regex = /(\d{2}-\d{2}-\d{4}), (in|out)/g;
let system = [];
let match;
while ((match = regex.exec(input)) !== null) {
system.push([match[1], match[2]]);
}

How to store values in an array Jquery?

I have a function:
chatManager.connect()
.then(currentUser => {
var final = currentUser.users;
var name = [];
var arr = [];
$.each(final,function(index,val){
if(val.name != '{{Auth::user()->name}}')
{
console.log(val.id); //Harry, Ron (each in different line)
arr = name.push(val.id)
console.log(arr); //1,2 (each in different line)
var presence = val.presenceStore.store.{{Auth::user()->name}}{{Auth::user()->id}}
}
});
I want the arr to be an array like [Harry,Ron]. Why is it not working? I am new to Jquery. Please help.

arr = name.push(val.id) is your problem. push returns the array's new length, not an array. Simply replace the line with
arr.push(val.id);

Array in Array : How to store array data in an array

For example I have brunch of data like below:
HTML:
<p class="test-tag">abc+dd</p><p class="test-tag">gf+sx</p>
and store in JavaScript in array form
var text = ["abc+dd","gf+sx"];
And I must return an array like below:
var res = [["abc", "dd"],["gf", "sx"]];
What's the best way to do this?

Something like below should work..
var finalArr = [];
$('.test-tag').each (function (){
var value = $(this).text;
var subArr = value. map(function (b){
return b.split('+');
})
finalArr. push(subArr);
})

You can map over your array and use split:
Example JSBin
var text = ["abc+dd","gf+sx"];
var array = text.map(function(v) {
return v.split('+');
});

Javascript multidimensional array not working

How to create multidimensional array??
I tried it so far:
var post_data = [];
var id = 1;
post_data[id] = [];
post_data[id]['name'] = 'abc';
post_data[id]['date'] = '01-03-2014';
post_data[id]['country'] = 'India';
console.log(post_data);
the above code is not giving me the key. Whats wrong?
DEMO FIDDLE
i want a output something like this:
[1]=> array
(
"name": "abc",
"date": "01-03-2014",
"country": "India",
)
How to get the above output???

To get wished result you can change
var post_data = [];
to
var post_data = {};
and
post_data[id] = {};

You are trying to make an array of object.
Try this : -
post_data[id] = {};

You are using the inner array as an object. The properties that you set on the array still is there, when you display it only the array items are shown.
You should use an object instead of an array, as you are not using the array as an array:
post_data[id] = {};
Instead of setting the properties after creating the object, you can set them when you create it:
post_data[id] = {
name: 'abc',
date: '01-03-2014',
country: 'India'
};

In the third line of code you have to write
post_data[id] = new Array();
So the entire code section looks like
var post_data = [];
var id = 1;
post_data[id] = new Array();
post_data[id]['name'] = 'abc';
post_data[id]['date'] = '01-03-2014';
post_data[id]['country'] = 'India';
console.log(post_data[id]['name']);
This should fix it, best of luck :)

javascript fails when populating array

When I run the following javascript, it fails when input_array[input_array.length] = id; is not commented out. Can anyone see what is causing this?
function cat_images_low_lag () {
var input_array = new array ();
cat_images = $(".category-description").next().find("img");
cat_images.each(function () {
url = $(this).parent().attr("href");
id = url.split("id=");
id = id[1];
input_array[input_array.length] = id;
});
alert ("trst");
alert(input_array.join("\n"));
}
cheers!

First thing, replace:
var input_array = new array ();
With:
var input_array = new Array();
And use this to insert:
input_array.push(id);
Or directly add:
input_array[input_array.length] = id;
Other ways to initialize arrays:
var input_array = [];

Others noted the capitalization problem, but since you're using jQuery, a nicer way to build the Array is like this:
function cat_images_low_lag () {
var input_array = $(".category-description + * img").map(function () {
return this.parentNode.href.split("id=")[1];
}).toArray();
alert ("trst");
alert(input_array.join("\n"));
}

Your initialization of the array is incorrect
var input_array = new array ();
You should use the shorthand
var input_array = [];
or
var input_array = new Array();
Moreover, to avoid having cat_images be a variable in the global scope, you may want to consider scoping it locally like this
var cat_images = $(".category-description").next().find("img");