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Array to Newline String to Array again through HTML

I have an array that comes in from from my API that I would like to arrange in a way that is better for the user (namely, in a column as opposed to the typical comma separated printed array).
This is my JS Fiddle to give a clearer picture: https://jsfiddle.net/2z89owas/
My question is, how can I get output3 to display just like output (and maintain its status as an iterable array like it was as dates)?

First you should not be using value for an html element. You can use .value for extracting value from inputs. Change your line to:
var val = document.getElementById('output2').innerHTML;
Afterwards, you have to split the same way you did join.
var dates3 = val.split('<br>');
document.getElementById('output3').innerHTML = dates3;

You can directly use join, something like:
document.getElementById('output3').innerHTML = dates.join(',');

You can try mapping over the contents of dates instead, as so:
let datesElem = dates.map(date =>`<p>${date}</p>`);
// test: console.log(datesElem)
document.getElementById('output3').innerHTML = datesElem

Using Jquery to get numeric value which is in between "/" in link

I am trying to fetch numeric value from link like this.
Example link
/produkt/114664/bergans-of-norway-airojohka-jakke-herre
So I need to fetch 114664.
I have used following jquery code
jQuery(document).ready(function($) {
var outputv = $('.-thumbnail a').map(function() {
return this.href.replace(/[^\d]/g, '');
}).get();
console.log( outputv );
});
https://jsfiddle.net/a2qL5oyp/1/
The issue I am facing is that in some cases I have urls like this
/produkt/114664/bergans-of-norway-3airojohka-3jakke-herre
Here I have "3" inside text string, so in my code I am actually getting the output as "11466433" But I only need 114664
So is there any possibility i can get numeric values only after /produkt/ ?

If you know that the path structure of your link will always be like in your question, it's safe to do this:
var path = '/produkt/114664/bergans-of-norway-airojohka-jakke-herre';
var id = path.split('/')[2];
This splits the string up by '/' into an array, where you can easily reference your desired value from there.

If you want the numerical part after /produkt/ (without limitiation where that might be...) use a regular expression, match against the string:
var str = '/produkt/114664/bergans-of-norway-3airojohka-3jakke-herre';
alert(str.match(/\/produkt\/(\d+)/)[1])
(Note: In the real code you need to make sure .match() returned a valid array before accessing [1])

Text Value From HTML Into Javascript Var?

I would like to know if the following line is the correct way to take html and put it into a Javascript var as numeric value?
var thePoolHeatingFeeRounded = Number(document.getElementsById("priceDisplayPoolHeating").innerHTML);
Nevermind that the variable name has the word 'rounded' in it. The value that I am trying to put into this var is a 2 point float that has already been rounded and it exist as html.
Below is the line of HTML code that is referenced by getElementsById...
$<div id="priceDisplayPoolHeating" class="priceDisplay">8.00</div>
Any input is greatly appreciated.

Try this instead:
var thePoolHeatingFeeRounded = Number(document.getElementById("priceDisplayPoolHeating").innerHTML);
You were calling getElementsById which is not correct (it is not plural), I changed it to getElementById
Tip: if you need to check whether the Number is valid you can use !isNaN(thePoolHeatingFeeRounded) or use a trick to turn it into a default number (such as 0 or -1) like this:
var thePoolHeatingFeeRounded = Number(document.getElementById("priceDisplayPoolHeating").innerHTML) || 0;
You can also use parseFloat():
var thePoolHeatingFeeRounded = parseFloat(document.getElementById("priceDisplayPoolHeating").innerHTML) || 0;

You are very close. Supposed to be getElementById, not Elements. I created a little code to show you how it works.
Here's what the code looks like in this website's code displayer:
function displayText(){
var thePoolHeatingFeeRounded = Number(document.getElementById("priceDisplayPoolHeating").innerHTML)
alert(thePoolHeatingFeeRounded);
}
<div id="priceDisplayPoolHeating">8.01</div><input type="button" onclick="displayText()" value="Display the innerHTML of Pool Heating">

Javascript Object not working with Native javascript methods like match(), replace etc

Here is the issue:
I go this Code:
var str = {"Acc":10 , "adm_data":"Denied"};
When I do something like:
console.log(str.Acc.match(/[0-9]+/g)) // To Get the Integer Value from the "Acc" key
Firebug Screams:
TypeError: str.Acc.match is not a function
console.log(str.Acc.match(/[0-9]+/g));
See Image:
I always do something like:
var str = "Hello _10";
console.log(str.match(/[0-9]+/g)) // This Works
Why is the Object thingi not working?
PLEASE NOTE:
As mentioned by #Fabrício Matté. The issue was that I was trying to
pass an integer Value to the .match method which does not belong
to integers. The solution was to do what #kundan Karn Suggested. Something like:
str.Acc.toString().match(/[0-9]+/g)// Converting it first to string then match. It worked!

match function works with string. So convert it to string first
str.Acc.toString().match(/[0-9]+/g)

It works just fine: http://jsfiddle.net/nKHLy/
but in order to get rid of the error you might want to try:
var str = {"Acc":"Hello_10" , "adm_data":"Denied"};
console.log(String(str.Acc).match(/[0-9]+/g));
or
var str = {"Acc":"Hello_10" , "adm_data":"Denied"};
console.log(str.Acc.toString().match(/[0-9]+/g));
To know the difference between the 2 options, check: What's the difference between String(value) vs value.toString()

How to substring in jquery

How can I use jquery on the client side to substring "nameGorge" and remove "name" so it outputs just "Gorge"?
var name = "nameGorge"; //output Gorge

No jQuery needed! Just use the substring method:
var gorge = name.substring(4);
Or if the text you want to remove isn't static:
var name = 'nameGorge';
var toRemove = 'name';
var gorge = name.replace(toRemove,'');

Using .split(). (Second version uses .slice() and .join() on the Array.)
var result = name.split('name')[1];
var result = name.split('name').slice( 1 ).join(''); // May be a little safer
Using .replace().
var result = name.replace('name','');
Using .slice() on a String.
var result = name.slice( 4 );

Standard javascript will do that using the following syntax:
string.substring(from, to)
var name = "nameGorge";
var output = name.substring(4);
Read more here: http://www.w3schools.com/jsref/jsref_substring.asp

That's just plain JavaScript: see substring and substr.

You don't need jquery in order to do that.
var placeHolder="name";
var res=name.substr(name.indexOf(placeHolder) + placeHolder.length);

var name = "nameGorge";
name.match(/[A-Z].*/)[0]

Yes you can, although it relies on Javascript's inherent functionality and not the jQuery library.
http://www.w3schools.com/jsref/jsref_substr.asp
The substr function will allow you to extract certain parts of the string.
Now, if you're looking for a specific string or character to use to find what part of the string to extract, you can make use of the indexOf function as well.
http://www.w3schools.com/jsref/jsref_IndexOf.asp
The question is somewhat vague though; even just link text with 'name' will achieve the desired result. What's the criteria for getting your substring, exactly?

How about the following?
<script charset='utf-8' type='text/javascript'>
jQuery(function($) { var a=$; a.noConflict();
//assumming that you are using an input text
// element with the text "nameGorge"
var itext_target = a("input[type='text']:contains('nameGorge')");
//gives the second part of the split which is 'Gorge'
itext_target.html().split("nameGorge")[1];
...
});
</script>