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How to make a leaderboard ranking scores JavaScript

Currently, my code shows the score of the user that's logged in. I want to show the highest score obtained by each user on the leaderboard until the top 10.
js from index.html
<script>
loadRankingTable();
window.onload = () => {
//Check login
if (sessionStorage.loggedInUser !== undefined) {
let oldData = localStorage.getItem(sessionStorage.loggedInUser);
console.log(JSON.parse(oldData))
if (oldData) {
oldData = JSON.parse(oldData);
oldData.topScore = highscore;
localStorage.setItem(sessionStorage.loggedInUser, JSON.stringify(oldData));
}
document.getElementById("Greeting").innerHTML = sessionStorage.loggedInUser;
}
}
</script>
prac.js
function loadRankingTable(){
let str = "<table><tr><th>Rank</th><th>Name</th><th>Score</th></tr>";
for(let key of Object.keys(localStorage)){
let usr = JSON.parse(localStorage[key]);
str += "<tr><td>" + "1" + "</td><td>" + sessionStorage.loggedInUser + "</td><td>" + highscore + "</td></tr>";
}
str += "</table>";
document.getElementById("Ranking").innerHTML = str;
}
The highscore gets stored in the local storage, but I want the logged in user's highscore shown next to their name on the leaderboard, up till the top 10.

Try this: (others have permission to copy and edit this)
function load(){
var userscores = {
"ex1": 10,
"noncy": 40,
"del3tus": 24,
"the_r0ck": 8,
"MONSTER_OSITY": 120
};
var max = 0;
var sorted = [];
for(var prop in userscores){
if(userscores[prop] >= max){
max = userscores[prop];
}
}
var cur = max;
for(var i = max; i > 0; i--){
for(var prop in userscores){
if(userscores[prop] == i){
sorted.push(prop);
}
}
}
var html = "";
for(var i = 0; i < sorted.length; i++){
html = "<tr><td>" + (i + 1) + "</td><td>" + sorted[i] + "</td><td>" + userscores[sorted[i]] + "</td></tr>";
document.getElementById("leaderboard").innerHTML += html;
}
}
<button onclick="load();">Load leaderboard</button>
<table id="leaderboard" border="1" cellSpacing="0px"><tr><th>#</th><th>Name</th><th>Points</th></tr></table>
If that doesn't work, let me know. You can also change it to make it fit better.

Google Docs Apps Script getBackgroundColor(Offset)

Let's say I have some sentences in Google Docs. Just one sentences as an example:
"My house is on fire"
I actually changed the background color so that every verb is red and every noun blue.
Now I want to make a list with all the verbs and another one with the nouns. Unfortunately getBackgroundColor() only seems to work with paragraphs and not with single words.
My idea was, to do something like this (I didn't yet have the time to think about how to do the loop, but that's not the point here anyway):
var doc = DocumentApp.getActiveDocument();
var body = doc.getBody();
var paragraphs = body.getParagraphs();
var colorVar = paragraphs[0].getText().match(/\w+/).getBackgroundColor(); // The regEx matches the first word. Next I want to get the background color.
Logger.log(colorVar);
}
The error message I get goes something like this:
"The function getBackgroundColor in the text object couldn't be found"
Thx for any help, or hints or comments!

You want to retrieve the text from a paragraph.
You want to retrieve each word and the background color of each word from the retrieved the text.
In this case, the color is the background color which is not getForegroundColor().
You want to achieve this using Google Apps Script.
If my understanding is correct, how about this answer? Please think of this as just one of several possible answers.
At first, the reason of your error is that getBackgroundColor() is the method of Class Text. In your script, getBackgroundColor() is used for the string value. By this, the error occurs.
In this answer, for achieving your goal, each character of the text retrieved from the paragraph is scanned, and each word and the background color of each word can be retrieved.
Sample script:
function myFunction() {
var doc = DocumentApp.getActiveDocument();
var body = doc.getBody();
var paragraphs = body.getParagraphs();
var textObj = paragraphs[0].editAsText();
var text = textObj.getText();
var res = [];
var temp = "";
for (var i = 0; i < text.length; i++) {
var c = text[i];
if (c != " ") {
temp += c;
} else {
if (temp != "") res.push({text: temp, color: textObj.getBackgroundColor(i - 1)});
temp = "";
}
}
Logger.log(res) // result
}
When you run the script, the text of 1st paragraph is parsed. And you can see the result with res as an object.
In this sample script, the 1st paragraph is used as a test case. So if you want to retrieve the value from other paragraph, please modify the script.
References:
getBackgroundColor()
getBackgroundColor(offset)
editAsText()
If I misunderstood your question and this was not the direction you want, I apologize.

Here's a script your welcome to take a look at. It highlights text that a user selects...even individual letters. I did it several years ago just to learn more about how documents work.
function highLightCurrentSelection() {
var conclusionStyle = {};
conclusionStyle[DocumentApp.Attribute.BACKGROUND_COLOR]='#ffffff';
conclusionStyle[DocumentApp.Attribute.FOREGROUND_COLOR]='#000000';
conclusionStyle[DocumentApp.Attribute.FONT_FAMILY]='Calibri';
conclusionStyle[DocumentApp.Attribute.FONT_SIZE]=20;
conclusionStyle[DocumentApp.Attribute.BOLD]=false;
conclusionStyle[DocumentApp.Attribute.HORIZONTAL_ALIGNMENT]=DocumentApp.HorizontalAlignment.LEFT;
conclusionStyle[DocumentApp.Attribute.VERTICAL_ALIGNMENT]=DocumentApp.VerticalAlignment.BOTTOM;
conclusionStyle[DocumentApp.Attribute.LINE_SPACING]=1.5;
conclusionStyle[DocumentApp.Attribute.HEIGHT]=2;
conclusionStyle[DocumentApp.Attribute.LEFT_TO_RIGHT]=true;
var br = '<br />';
var selection = DocumentApp.getActiveDocument().getSelection();
var s='';
if(selection) {
s+=br + '<strong>Elements in Current Selection</strong>';
var selectedElements = selection.getRangeElements();
for(var i=0;i<selectedElements.length;i++) {
var selElem = selectedElements[i];
var el = selElem.getElement();
var isPartial = selElem.isPartial();
if(isPartial) {
var selStart = selElem.getStartOffset();
var selEnd = selElem.getEndOffsetInclusive();
s+=br + 'isPartial:true selStart=' + selStart + ' selEnd=' + selEnd ;
var bgcolor = (el.asText().getBackgroundColor(selStart)=='#ffff00')?'#ffffff':'#ffff00';
el.asText().setBackgroundColor(selStart, selEnd, bgcolor)
}else {
var selStart = selElem.getStartOffset();
var selEnd = selElem.getEndOffsetInclusive();
s+=br + 'isPartial:false selStart=' + selStart + ' selEnd=' + selEnd ;
var bgcolor = (el.asText().getBackgroundColor()=='#ffff00')?'#ffffff':'#ffff00';
el.asText().setBackgroundColor(bgcolor);
}
var elType=el.getType();
s+=br + 'selectedElement[' + i + '].getType()= ' + elType;
if(elType==DocumentApp.ElementType.TEXT) {
var txt = selElem.getElement().asText().getText().slice(selStart,selEnd+1);
var elattrs = el.getAttributes();
if(elattrs)
{
s+=br + 'Type:<strong>TEXT</strong>';
s+=br + 'Text:<span style="color:#ff0000">' + txt + '</span>';
s+=br + 'Length: ' + txt.length;
s+=br + '<div id="sel' + Number(i) + '" style="display:none;">';
for(var key in elattrs)
{
s+= br + '<strong>' + key + '</strong>' + ' = ' + elattrs[key];
s+=br + '<input type="text" value="' + elattrs[key] + '" id="elattr' + key + Number(i) + '" />';
s+=br + '<input id="elattrbtn' + Number(i) + '" type="button" value="Save Changes" onClick="setSelectedElementAttribute(\'' + key + '\',' + i + ');" />'
}
s+='</div>Show/Hide';
}
}
if(elType==DocumentApp.ElementType.PARAGRAPH) {
var txt = selElem.getElement().asParagraph().getText();
var elattrs = el.getAttributes();
if(elattrs)
{
s+=br + '<strong>PARAGRAPH Attributes</strong>';
s+=br + 'Text:<span style="color:#ff0000">' + txt + '</span> Text Length= ' + txt.length;
for(var key in elattrs)
{
s+= br + key + ' = ' + elattrs[key];
}
}
}
s+='<hr width="100%"/>';
}
//var finalP=DocumentApp.getActiveDocument().getBody().appendParagraph('Total Number of Elements: ' + Number(selectedElements.length));
//finalP.setAttributes(conclusionStyle);
}else {
s+= br + 'No Elements found in current selection';
}
s+='<input type="button" value="Toggle HighLight" onclick="google.script.run.highLightCurrentSelection();"/>';
//s+='<input type="button" value="Exit" onClick="google.script.host.close();" />';
DocumentApp.getUi().showSidebar(HtmlService.createHtmlOutputFromFile('htmlToBody').append(s).setWidth(800).setHeight(450).setTitle('Selected Elements'));
}

How to populate HTML drop down with Text File using JavaScript?

I have been stuck on this problem for a while now, Basically i want to populate the below select with option group and option check boxes. The text file imports to JS just fine, i'm getting the problem trying to populate the drop down. Here is my HTML:
function LoadTxtFile(p) {
var AllTxtdata = '';
var targetFile = p.target.files[0];
if (targetFile) {
// Create file reader
var FileRead = new FileReader();
FileRead.onload = function (e) {
if (FileRead.readyState === 2) {
AllTxtdata = FileRead;
// Split the results into individual lines
var lines = FileRead.result.split('\n').map(function (line) {
return line.trim();
});
var select = $("#MySelect");
var optionCounter = 0;
var currentGroup = "";
lines.forEach(function (line) {
// If line ends it " -" create option group
if (line.endsWith(" -")) {
currentGroup = line.substring(0, line.length - 2);
optionCounter = 0;
select.append("<optgroup id'" + currentGroup + "' label='" + currentGroup + "'>");
// Else if the line is empty close the option group
} else if (line === "") {
select.append("</optgroup>");
// Else add each of the values to the option group
} else {
select.append("<option type='checkbox' id='" + (currentGroup + optionCounter) + "' name'"
+ (currentGroup + optionCounter) + "' value='"
+ line + "'>" + line + "</option>");
}
});
}
}
FileRead.readAsText(targetFile);
}
}
document.getElementById('file').addEventListener('change', LoadTxtFile, false);
<html>
<body>
<select name="MySelect" id="MySelect"/>
</body>
</html>

I believe you are using append incorrectly as you are dealing with partial nodes with the optgroup. I would build the html snippet then append it in one go. This would also bring a performance benefit as multiple DOM manipulations can get expensive.
I'd do something like the following.
function LoadTxtFile(p) {
var AllTxtdata = '';
var htmlString = '';
//Optional Templates. I find them more readable
var optGroupTemplate = "<optgroup id='{{currentGroup}}' label='{{currentGroup}}'>";
var optionTemplate = "<option type='checkbox' id='{{currentGroupCounter}}' name='{{currentGroupCounter}}' value='{{line}}'>{{line}}</option>";
var targetFile = p.target.files[0];
if (targetFile) {
// Create file reader
var FileRead = new FileReader();
FileRead.onload = function (e) {
if (FileRead.readyState === 2) {
AllTxtdata = FileRead;
// Split the results into individual lines
var lines = FileRead.result.split('\n').map(function (line) {
return line.trim();
});
var select = $("#MySelect");
var optionCounter = 0;
var currentGroup = "";
lines.forEach(function (line) {
// If line ends it " -" create option group
if (line.endsWith(" -")) {
currentGroup = line.substring(0, line.length - 2);
optionCounter = 0;
htmlString += optGroupTemplate.replace("{{currentGroup}}", currentGroup);
// Else if the line is empty close the option group
} else if (line === "") {
htmlString +="</optgroup>";
// Else add each of the values to the option group
} else {
//I'm assuming you want to increment optionCounter
htmlString += optionTemplate.replace("{{currentGroupCounter}}", currentGroup + optionCounter).replace("{{line}}", line);
}
});
select.append(htmlString);
}
}
FileRead.readAsText(targetFile);
}
}
document.getElementById('file').addEventListener('change', LoadTxtFile, false);
NOTE the above is untested and may need some debugging.

How do you generate a previous and next button for an array?

I have a function with this specific array in it.
var elementsArray = xmlDocument.documentElement.getElementsByTagName('track');
// console.log(elementsArray);
var arrayLength = elementsArray.length;
var output = "<table>";
for (var i=0; i < arrayLength; i++)
{
var title = elementsArray[i].getElementsByTagName('title')[0].firstChild.nodeValue;
var artist = elementsArray[i].getElementsByTagName('artist')[0].firstChild.nodeValue;
var length = elementsArray[i].getElementsByTagName('length')[0].firstChild.nodeValue;
var filename = elementsArray[i].getElementsByTagName('filename')[0].firstChild.nodeValue;
console.log(title + ' ' + artist + ' ' + length + ' ' + filename);
output += "<tr>";
output += ("<td onclick='songSelect(\"" + filename + "\")'>" + title + "</td><td>" + artist + "</td>");
output += "</tr>";
}
With this array how would i generate a previous and next button to move.
http://jsfiddle.net/xbesjknL/

Once could use a linked list or even the notion of C-like pointers that point at the prev/curr/next tracks. But alas this is Javascript and the client side is too processing burdened.
So you could just build your own simplified idea of pointers in a cursor like object that is constantly pointing at the current track's index, the previous track's index and the next. And you'd call the refresh method everytime the user clicks the prev or next buttons to update the cursor's pointers accordingly.
var cursor = {
prev:(elementsArray.length-1),
curr:0,
next:(1 % (elementsArray.length-1)),
refresh: function(button){ //button is either the btnPrev or btnNext elements
if (button.getAttribute("id") === "btnPrev") {
old_curr = this.curr;
this.curr = this.prev;
if ((this.curr-1) < 0)
this.prev = elementsArray.length-1;
else
this.prev = this.curr - 1;
this.next = old_curr;
} else {
old_curr = this.curr;
this.curr = this.next;
if ((this.curr+1) > (elementsArray.length-1))
this.next= 0;
else
if (elementsArray.length === 1)
this.next = 0;
else
this.next = this.curr+1;
this.prev = old_curr;
}
}
};
// example usage:
cursor.refresh(btnPrev);
elementsArray[cursor.curr]; // gives the previous track, which is now the current track
You can even simplify this even more by just keeping track of only the current track. Note

get text from attribute and format it

I have a div elements with data-seat and data-row property:
<div class='selected' data-seat='1' data-row='1'></div>
<div class='selected' data-seat='2' data-row='1'></div>
<div class='selected' data-seat='3' data-row='1'></div>
<div class='selected' data-seat='1' data-row='2'></div>
<div class='selected' data-seat='2' data-row='2'></div>
I want print friendly message for selected seats:
var selectedPlaceTextFormated ='';
$(".selected").each(function () {
var selectedPlace = $(this);
selectedPlaceTextFormated += "Row " + selectedPlace.attr("data-row") + " (seat " + selectedPlace.attr("data-seat") + ")\n";
});
alert(selectedPlaceTextFormated);
This code works well and shows the following:
Row 1 (seat 1)
Row 1 (seat 2)
Row 1 (seat 3)
Row 2 (seat 1)
Row 2 (seat 2)
But, I want group seats by row, i.e I want the following:
Row 1(seats: 1,2,3)
Row 2(seats: 1,2)
also, order by row number. How can I do this?
Thanks. DEMO

Here is the code
var selectedPlaceTextFormated ='';
var row_array = [];
$(".selected").each(function () {
var selectedPlace = $(this);
if (!row_array[selectedPlace.attr("data-row")]){
row_array[selectedPlace.attr("data-row")] = selectedPlace.attr("data-seat");
}
else row_array[selectedPlace.attr("data-row")] += ','+selectedPlace.attr("data-seat");
});
for (row in row_array){
alert("Row "+ row +"(seat " + row_array[row] + ")\n" );
}
And here the link to the working fiddle: http://jsfiddle.net/3gVHg/

First of all, jQuery is kind enough to automatically grab data- attributes into its data expando object, that means, you can access those data via:
jQueryObject.data('seat');
for instance.
Your actual question could get solved like
var $selected = $('.selected'),
availableRows = [ ],
selectedPlaceTextFormated = '',
currentRow,
currentSeats;
$selected.each(function(_, node) {
if( availableRows.indexOf( currentRow = $(node).data('row') ) === -1 ) {
availableRows.push( currentRow );
}
});
availableRows.forEach(function( row ) {
selectedPlaceTextFormated += 'Row ' + row + '(';
currentSeats = $selected.filter('[data-row=' + row + ']').map(function(_, node) {
return $(this).data('seat');
}).get();
selectedPlaceTextFormated += currentSeats.join(',') + ')\n';
});
jsFiddle: http://jsfiddle.net/gJFJW/3/

You need to use another variable to store the row, and format accordingly.
var selectedPlaceTextFormated ='';
var prevRow = 0;
$(".selected").each(function () {
var selectedPlace = $(this);
var row = selectedPlace.attr("data-row");
var seat = selectedPlace.attr("data-seat");
if(prevRow == row){
selectedPlaceTextFormated += "," + seat;
}
else{
if(selectedPlaceTextFormated != ''){
selectedPlaceTextFormated += ')\n';
}
selectedPlaceTextFormated += "Row " + row + " (seat " + seat;
prevRow = row;
}
});
selectedPlaceTextFormated += ')\n';
alert(selectedPlaceTextFormated);
Check http://jsfiddle.net/nsjithin/R8HHC/

This can be achieved with a few slight modifications to your existing code to use arrays; these arrays are then used to build a string:
var selectedPlaceTextFormated = [];
var textFormatted = '';
$(".selected").each(function(i) {
var selectedPlace = $(this);
var arr = [];
selectedPlaceTextFormated[selectedPlace.attr("data-row")] += "," + selectedPlace.attr("data-seat");
});
selectedPlaceTextFormated.shift();
for (var i = 0; i < selectedPlaceTextFormated.length; i++) {
var arr2 = selectedPlaceTextFormated[i].split(",");
arr2.shift();
textFormatted += "Row " + (i + 1) + " seats: (" + arr2.join(",") + ")\n";
}
alert(textFormatted);
​
Demo

I'd just do this:
var text = [];
$(".selected").each(function () {
var a = parseInt($(this).data('row'), 10),
b = $(this).data('seat');
text[a] = ((text[a])?text[a]+', ':'')+b;
});
var selectedPlaceTextFormated ='';
$.each(text, function(index, elem) {
if (!this.Window) selectedPlaceTextFormated += "Row " + index + " (seat " + elem + ")\n";
});
alert(selectedPlaceTextFormated);
FIDDLE