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Is it possible to extract time from a text comment using js?

First let me apologize for my ignorance when it comes to js.
Is it possible to extract a time from text? For example, i'd like to extract the time from the following text "Results phoned by _ to _ at 2018/04/12 01:31:33. Results confirmed. Read back."
Is this even possible to accomplish this? The software that I use allows for both js and BIRT coding. Any help would be appreciated.
var str = dataSetRow["Comment - Result"];
var time = str.match(/([0-1]\d|2[0-3]):([0-5]\d):([0-5]\d)/g);
time;
Outputs to "Ljava.lang.Object;#bd6334" and i have no idea how to fix it.
I get the "Ljava.lang.Object;#" error for every row of my table with different characters after the #
If I change the code to:
var str = dataSetRow["Comment - Result"];
var time = str.match(/\d{2}:\d{2}:\d{2}/g);
if (time.length>0) time [0];
else "";
I get the desired result but it will only display 1 row of a table with significantly more rows. Am I missing something?

Managed to get it working with some help from our system's manufacturer:
var str = dataSetRow["Comment - Result"];
var time = null;
if (str != null) time = str.match(/\d{4}\/\d{2}\/\d{2} \d{2}:\d{2}/);
var output = "";
if (time != null) {
for (var i = 0; i < time.length; ++i) {
if (i > 0) output += "\n"; // this adds a line break in a computed column expression
output += time[i];
}
}
output;

Anyway to compress a string to something smaller in javascript? And make it reversible?

I have the following string:
SigV1i8njyrAGrbAfHRNdM3fmEu3kd7keGsqTTDG3Wt3tXqT153eFya2JsEigrK7Pjmh6HhEQLp5bmNXyeHsKNELW7cD3
Is there a javascript string compression function that can shorten this somehow?
I also need a way to extract it back to its original string state.

The idea is to convert the available base62 string into a higher base string. This way you save space. But doing this in vanilla JS (or using Jquery) is difficult because JS doesn't handle big numbers very well. With the help of an external library bigint.js, it is possible. You can test it here. This code was not written by me, but its quite useful:
var base_symbols = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz~`!##$%^&*()-_=+[{]}\\|;:'\",<.>/?¿¡";
function baseConvert(src, from_base, to_base, src_symbol_table, dest_symbol_table) {
// From: convert.js: http://rot47.net/_js/convert.js
// Modified by MLM to work with BigInteger: https://github.com/peterolson/BigInteger.js
src_symbol_table = src_symbol_table ? src_symbol_table : base_symbols;
dest_symbol_table = dest_symbol_table ? dest_symbol_table : src_symbol_table;
if(from_base > src_symbol_table.length || to_base > dest_symbol_table.length) {
console.warn("Can't convert", src, "to base", to_base, "greater than symbol table length. src-table:", src_symbol_table.length, "dest-table:", dest_symbol_table.length);
return false;
}
var val = bigInt(0);
for(var i = 0; i < src.length; i ++) {
val = val.multiply(from_base).add(src_symbol_table.indexOf(src.charAt(i)));
}
if(val.lesser(0)) {
return 0;
}
var r = val.mod(to_base);
var res = dest_symbol_table.charAt(r);
var q = val.divide(to_base);
while(!q.equals(0)) {
r = q.mod(to_base);
q = q.divide(to_base);
res = dest_symbol_table.charAt(r) + res;
}
return res;
}
var input = 'SigV1i8njyrAGrbAfHRNdM3fmEu3kd7keGsqTTDG3Wt3tXqT153eFya2JsEigrK7Pjmh6HhEQLp5bmNXyeHsKNELW7cD3';
var a = baseConvert(input, 62, 80);
baseConvert(a, 80, 62);
The resultant output converts 94 characters into 82 characters:
SigV1i8njyrAGrbAfHRNdM3fmEu3kd7keGsqTTDG3Wt3tXqT153eFya2JsEigrK7Pjmh6HhEQLp5bmNXyeHsKNELW7cD3
$sIn3#WAto¿rf<zVn"+:Pkgq;&x.fciVZC7O)`0ii+sf/\X¿CM9Ad!0Z^q?t6uK=w}S8=JZhboIHd'fY\]Qf
SigV1i8njyrAGrbAfHRNdM3fmEu3kd7keGsqTTDG3Wt3tXqT153eFya2JsEigrK7Pjmh6HhEQLp5bmNXyeHsKNELW7cD3
To get better compression, just chanage the base_symbols to include a lot more characters and then convert the input into an even higher base.

Concatenating strings in Google Apps Script

How do I get both values represented by i and j into the getSheetByName function?
Disclaimer: I am brand new at coding and am probably asking the wrong questions. My goal is to create a simple code that will delete sheets automatically by looping through the sheet names: Week 1, Week 2, etc.
Here's my code so far:
function myFunction() {
var sheet = SpreadsheetApp.getActiveSpreadsheet()
var i = "Week "
var j = 32
var mysheet = sheet.getSheetByName(i&j)
sheet.deleteSheet(mysheet)
}

In your code you have written i&j that's not the syntax to concat in Google apps script. Instead you can simply use i + j.
For looping you'll need to use any loop, like for, while, do-while.
Combining these suggestions, here is my final suggestion.
Try something like this [By using 'try' here I mean, simply don't copy-n-paste and use. Try to understand and write your own code, curated for your specific need. Maybe that way, we'll grow/learn more]
function myFunction() {
var START_WEEK = 1; //Put your starting week count here
var END_WEEK = 2; //Put your ending week count here
var spreadSheet = SpreadsheetApp.getActiveSpreadsheet()
var pre_name = "Week"
var i;
for (i = START_WEEK; i <= END_WEEK; i++) {
try {
spreadSheet.deleteSheet(spreadSheet.getSheetByName(pre_name + " " + i))
} catch (exp) {
//Maybe sheet with that name is not found
Logger.log(exp.toString());
}
}
}
This code loop through all sheet whose name start with "Week " and then followed by week count, up till the end week count and if that's found it's deleting them.
Make sure you put in START_WEEK and END_WEEK properly.
Let me know if this doesn't work for you or if you have any query.
Thanks

Declaring and setting variable in JavaScript

I'm currently using the following JavaScript in a Google Chrome Extension to automate the 'add to cart' process for purchasing sneakers on nike.com;
var size_i_want = "11";
function fRun()
{enter code here
// Select size option.
var sizesList=document.getElementsByName("skuAndSize")[0];
for(var i=0; i<sizesList.length; i++)
{
if(sizesList.options[i].text.trim() == size_i_want)
{
sizesList.selectedIndex = i;
}
}
var aButtons = document.getElementsByTagName("button");
for(var i = 0; i < aButtons.length; ++i)
{
if(aButtons[i].className.indexOf("add-to-cart") > -1)
{
aButtons[i].click();
}
}
}
function fTick()
{
if(document.getElementsByName("skuAndSize")[0] != undefined)
{
setTimeout("fRun()", 600);
//fRun();
}else{
setTimeout("fTick()", 300);
}
}
setTimeout("fTick()", 300);
This script works perfectly for nike.com in the States, however does not work correctly for nike websites in other countries like the UK and Sweden.
As you can probably tell I am new to JavaScript and am still researching high and low to understand the language. However I understand this comes down to the fact that
var size_i_want = "11";
value is set as an integer (number) however on the Nike UK website the node that this affects contains letters, for example "UK 10.5".
Would somebody be able to help me declare a new variable and set it's value so that it contains both letters and numbers? I also have a feeling that this will impact the script as well, so help around that area is much appreciated too.

In javascript, variables are not typesafe, so you don't declare them as integers or strings. Coincidently:
var size_i_want = "11";
This is already a string. So you should already be able to add letters to it. Just change it to:
var size_i_want = "UK 10.5";

As millerbr already said javascript is not type safe.
The mix of letters and numbers should not have impact on the script, because
size_i_want = "11";
size_i_want = "UK 10.5";
are both strings.

Letters to predefined numbers conversion in one window

)
I have searched high and low, but i can´t find what i need. Or i´m to stupid to get it right ;-)
I need a page with several input boxes where i can type some text, and then an output area below each input, that shows the text converted to some predefined numbers.
example:
input: abcde fghi æøå (i need all kinds of characters like .,/: etc.)
output: 064 065 066 067 068 032
So it needs to convert like this:
"a"="064 "
"b"="065 "
"space"="032 "
(and yes, each number in output needs to be separated, or a space added after each number)
I have tried some different cipher guides in both php and javascript, but can´t get it to work. I did do an Excel document that could do some of it, but it had a limited amount of characters it could convert, then it started behaving weird. So i thought maybe PHP was the answer!
Any help is very appreciated
/Rasmus

In the spirit of elclanrs deleted answer, and for posterity:
<script>
// Using standard for loop
function stringToCharcodes(s) {
var result = [];
function pad(n){ return (n<10? '00' : n<100? '0' : 0) + n;}
for (var i=0, iLen=s.length; i<iLen; i++) {
result.push(pad(s.charCodeAt(i)));
}
return result.join(' ');
}
// Using ES5 forEach
function stringToCharcodes2(s) {
var result = [];
function pad(n){ return (n<10? '00' : n<100? '0' : 0) + n;}
s.split('').forEach(function(a){result.push(pad(a.charCodeAt(0)))});
return result.join(' ');
}
</script>
<input onkeyup="document.getElementById('s0').innerHTML = stringToCharcodes(this.value);"><br>
<span id="s0"></span>
Edit
If you want a custom mapping, use an object (I've only included 2 characters, you can add as many as you want):
var mapChars = (function() {
var mapping = {'198':'019', '230':'018'};
return function (s) {
var c, result = [];
for (var i=0, iLen=s.length; i<iLen; i++) {
c = s.charCodeAt(i);
result.push(c in mapping? mapping[c] : c);
}
return result.join(' ');
}
}());
alert(mapChars('Ææ')); //
Using the character code for mapping seems to be a reasonable solution, using the actual character may be subject to different page character encoding.