Develop Reference

Updating value in for loop / Reseting a for loop?

I'm working on my first school project so I don't have much experience in doing such web applications, that's why I decided to ask here.
How can I update the value in the for loop syntax or reset it entirely, so it iterates again, like I just reloaded it? I have another function that I decided not to show, simply because it would be useless to. What it does in the end is increments the taskCount.length by one. This part technically works but problem is, the function I'm going to show you now, once iterated, will always keep the default taskCount.length value, once the page is loaded, it never changes there. Is there any way I can update it?
Here's an example: The function above makes taskCount.length = '5' but when the page started it was taskCount.length = 4, and when I do alert(taskCount.length) from the console, I get 5. But the for loop doesn't want to change.
for (var i = 0; i < taskCount.length; i++) {
document.getElementsByClassName('task')[i].addEventListener('click', ((j) => {
return function() {
var shadow = document.createElement('div');
// Styling
var changingWindow = document.createElement('div');
// Styling
var changingTitle = document.createElement('p');
// Styling
var changingText = document.createElement('p');
// Styling
var changingTitleNode = document.createTextNode('Промяна');
var changingTextNode = document.createTextNode('Моля, изберете действие.');
var deleteTask = document.createElement('button');
var goUp = document.createElement('button');
var goDown = document.createElement('button');
var unchange = document.createElement('button');
// Styling
var deleteElementNode = document.createTextNode('Премахни задачата');
var goUpNode = document.createTextNode('Премести нагоре');
var goDownNode = document.createTextNode('Премести надолу');
var unchangeNode = document.createTextNode('Отказ');
var justBreak = document.createElement('br');
var justBreakAgain = document.createElement('br');
var justBreakOneMoreTime = document.createElement('br');
body.appendChild(shadow);
shadow.appendChild(changingWindow);
changingWindow.appendChild(changingTitle);
changingTitle.appendChild(changingTitleNode);
changingWindow.appendChild(changingText);
changingText.appendChild(changingTextNode);
changingWindow.appendChild(deleteTask);
deleteTask.appendChild(deleteElementNode);
deleteTask.onclick = function() {
document.getElementsByClassName('task')[j].parentNode.removeChild(document.getElementsByClassName('task')[j]);
shadow.parentNode.removeChild(shadow);
localStorage.setItem("listContent", document.getElementById('list').innerHTML);
}
changingWindow.appendChild(justBreak);
changingWindow.appendChild(goUp);
goUp.appendChild(goUpNode);
goUp.onclick = function() {
if (j !== 0) {
var saveThisTaskValue = document.getElementsByClassName('task')[j].innerHTML;
var savePreviousTaskValue = document.getElementsByClassName('task')[j - 1].innerHTML;
document.getElementsByClassName('task')[j].innerHTML = savePreviousTaskValue;
document.getElementsByClassName('task')[j - 1].innerHTML = saveThisTaskValue;
}
shadow.parentNode.removeChild(shadow);
localStorage.setItem("listContent", document.getElementById('list').innerHTML);
}
changingWindow.appendChild(justBreakAgain);
changingWindow.appendChild(goDown);
goDown.appendChild(goDownNode);
goDown.onclick = function() {
if (j !== document.getElementsByClassName('task').length - 1) {
var saveThisTaskValue = document.getElementsByClassName('task')[j].innerHTML;
var saveNextTaskValue = document.getElementsByClassName('task')[j + 1].innerHTML;
document.getElementsByClassName('task')[j].innerHTML = saveNextTaskValue;
document.getElementsByClassName('task')[j + 1].innerHTML = saveThisTaskValue;
}
shadow.parentNode.removeChild(shadow);
localStorage.setItem("listContent", document.getElementById('list').innerHTML);
}
changingWindow.appendChild(justBreakOneMoreTime);
changingWindow.appendChild(unchange);
unchange.appendChild(unchangeNode);
unchange.onclick = function() {
shadow.parentNode.removeChild(shadow);
}
}
})(i))
}

As a matter of the page reloading, you can always save the value as a cookie and reuse it again and again. You can update it whenever you want.

I don't fully understand you question, but maybe some recursion is what you need. Something along the lines of:
loop(5);
function loop(xTimes) {
for (var i = 0; i < xTimes; i++) {
if (newXTimes !== xTimes) {
loop(newXtimes);
break;
}
}
}
Maybe set newxTimes as a global variable that can be accessed inside loop.

In case someone "from the future" reads this question and it doesn't have any answers, I came up with the solution to reload the page everytime you change the value. Still, I'd like to do it without reloading.

How can I display my var array name in HTML textblock?

I want to display my var array names in a textblock. These need to change depending on what box is ticked in my form.
Now I can show the values in the array, but I need to display the actual name too. I am VERY new to coding, and I have trouble finding the right words to describe my problem, thus not finding any solution. I hope you can help me out.
var color_prices = new Array();
color_prices["Orange"]=1;
color_prices["Blue"]=2;
color_prices["Green"]=3;
function getColorPrice()
{
var ColorPrice=0;
var theForm = document.forms["order-form"];
var selectedColor = theForm.elements["COLOR"];
for(var i = 0; i < selectedColor.length; i++)
{
if(selectedColor[i].checked)
{
ColorPrice = color_prices[selectedColor[i].value];
break;
}
}
return ColorPrice;
}
var colorPrice = getColorPrice();
document.getElementById('colorPrice').innerHTML = colorPrice.toFixed(2);
Right now I 'stole' some code online to display the value of "orange" in my html (so "1") and this works but I have no idea how to display the value "orange" in my html.
I hope I explained it correctly.

A solution could be to change your ColorPrice variable to be an object to be able to store the color price and the color name, in my example I'm also changing the name of the variable to colorDetails to be more descriptive about what is containing
var color_prices = new Array();
color_prices["Orange"]=1;
color_prices["Blue"]=2;
color_prices["Green"]=3;
function getColorDetails()
{
//here we rename the variable and convert from integer to object
var colorDetails = {
price: 0,
name: undefined
};
var theForm = document.forms["order-form"];
var selectedColor = theForm.elements["COLOR"];
for(var i = 0; i < selectedColor.length; i++)
{
if(selectedColor[i].checked)
{
//here we store the color price inside colorDetails
colorDetails.price = color_prices[selectedColor[i].value];
//and we add this new line where we save the name of the color
colorDetails.name = selectedColor[i].value;
break;
}
}
return colorDetails;
}
var colorDetails = getColorDetails();
document.getElementById('colorPrice').innerHTML = colorDetails.name + ": " + colorDetails.price.toFixed(2);

TypeError: Cannot read property "length" from undefined variables

I have worked with code that pulls table information off a site and then places into Google Sheets. While this had worked great for months, it has come to my attention that is has randomly stopped working.
I am getting the message "TypeError: Cannot read property "length" from undefined." From code:
for (var c=0; c<current_adds_array.length; c++) {
I have done extensive searching but cannot come to conclusion as to what is wrong.
Full code seen here:
function onOpen() {
var ui = SpreadsheetApp.getUi();
ui.createMenu('Get Data')
.addItem('Add new dispatch items','addNewThings')
.addToUi();
}
function addNewThings() {
// get page
var html = UrlFetchApp.fetch("#").getContentText();
// bypass google's new XmlService because html isn't well-formed
var doc = Xml.parse(html, true);
var bodyHtml = doc.html.body.toXmlString();
// but still use XmlService so we can use getDescendants() and getChild(), etc.
// see: https://developers.google.com/apps-script/reference/xml-service/
doc = XmlService.parse(bodyHtml);
var html = doc.getRootElement();
// a way to dig around
// Logger.log(doc.getRootElement().getChild('form').getChildren('table'));
// find and dig into table using getElementById and getElementsByTagName (by class fails)
var tablecontents = getElementById(html, 'formId:tableExUpdateId');
// we could dig deeper by tag name (next two lines)
// var tbodycontents = getElementsByTagName(tablecontents, 'tbody');
// var trcontents = getElementsByTagName(tbodycontents, 'tr');
// or just get it directly, since we know it's immediate children
var trcontents = tablecontents.getChild('tbody').getChildren('tr');
// create a nice little array to pass
var current_adds_array = Array();
// now let's iterate through them
for (var i=0; i<trcontents.length; i++) {
//Logger.log(trcontents[i].getDescendants());
// and grab all the spans
var trcontentsspan = getElementsByTagName(trcontents[i], 'span');
// if there's as many as expected, let's get values
if (trcontentsspan.length > 5) {
var call_num = trcontentsspan[0].getValue();
var call_time = trcontentsspan[1].getValue();
var rptd_location = trcontentsspan[2].getValue();
var rptd_district = trcontentsspan[3].getValue();
var call_nature = trcontentsspan[4].getValue();
var call_status = trcontentsspan[5].getValue();
//saveRow(call_num, call_time, rptd_location, rptd_district, call_nature, call_status);
current_adds_array.push(Array(call_num, call_time, rptd_location, rptd_district, call_nature, call_status));
}
}
saveRow(current_adds_array);
}
//doGet();
function saveRow(current_adds_array) {
// load in sheet
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getSheets()[0];
// find the current last row to make data range
var current_last_row = sheet.getLastRow();
var current_last_row_begin = current_last_row - 50;
if (current_last_row_begin < 1) current_last_row_begin = 1;
if (current_last_row < 1) current_last_row = 1;
//Logger.log("A"+current_last_row_begin+":F"+current_last_row);
var last_x_rows = sheet.getRange("A"+current_last_row_begin+":F"+current_last_row).getValues();
var call_num, call_time, rptd_location, rptd_district, call_nature, call_status;
// iterate through the current adds array
for (var c=0; c<current_adds_array.length; c++) {
call_num = current_adds_array[c][0];
call_time = current_adds_array[c][1];
rptd_location = current_adds_array[c][2];
rptd_district = current_adds_array[c][3];
call_nature = current_adds_array[c][4];
call_status = current_adds_array[c][5];
// find out if the ID is already there
var is_in_spreadsheet = false;
for (var i=0; i<last_x_rows.length; i++) {
//Logger.log(call_num+" == "+last_15_rows[i][0]);
if (call_num == last_x_rows[i][0] && call_time != last_x_rows[i][1]) is_in_spreadsheet = true;
}
Logger.log(is_in_spreadsheet);
//Logger.log(last_15_rows.length);
if (!is_in_spreadsheet) {
Logger.log("Adding "+call_num);
sheet.appendRow([call_num,call_time,rptd_location,rptd_district,call_nature,call_status]);
}
}
}
function getElementById(element, idToFind) {
var descendants = element.getDescendants();
for(i in descendants) {
var elt = descendants[i].asElement();
if( elt !=null) {
var id = elt.getAttribute('id');
if( id !=null && id.getValue()== idToFind) return elt;
}
}
}
function clearRange() {
//replace 'Sheet1' with your actual sheet name
var sheet = SpreadsheetApp.getActive().getSheetByName('Sheet1');
sheet.getRange('A2:F').clearContent();}
function getElementsByTagName(element, tagName) {
var data = [];
var descendants = element.getDescendants();
for(i in descendants) {
var elt = descendants[i].asElement();
if( elt !=null && elt.getName()== tagName) data.push(elt);
}
return data;
}
var sheet = SpreadsheetApp.getActiveSheet();
var range = sheet.getRange("C:C");
range.setValues(range.getValues().map(function(row) {
return [row[0].replace(/MKE$/, " Milwaukee, Wisconsin")];
}));

Please be careful when instantiating a new array. You are currently using var current_adds_array = Array(). You're not only missing the new keyword, but also, this constructor is intended to instantiate an Array with an Array-like object.
Try changing this to var current_adds_array = []

How to dynamically create new objects in a loop

I'm following a JS course and I was wondering if it was possible to create new variables in loops?
My example:
JavaScript
var films = {
init: function (titre, annee, real) {
this.titre = titre;
this.annee = annee;
this.real = real;
},
decrire: function () {
var description = this.titre + "(" + this.annee + ")" + ", réalisé par " + this.real;
return description;
}
};
for (var i = 0; i < 4; i++) {
var film = Object.create(films);
film = prompt("Film:");
annee = prompt("année");
real = prompt("real");
}
films.forEach(function (film) {
console.log(decrire());
}
I would like to create new objects at each turn of the loop and ask people for titles, years, and realisators, finally print it in the console.
But I get something like this for my last line of code:
Uncaught SyntaxError: missing ) after argument list
And my webpage doesn't ask me to put a new movie =/ I don't know how to figure this out.
Where could I find some documentation about this?

Missing ) to close forEach function. Should be
films.forEach(function (film){
console.log(decrire());
});
EDIT: Your code contains several other errors too. Sorry for ignoring.
Yes, you can create new variables in loops.
I have fixed your code like you probably wanted it to work. See code comments.
// It's recommened to use Capitalized name for a "class" like here.
// This is NOT very good Javascript, but it works.
var Film = {
init: function (titre, annee, real) {
this.titre = titre;
this.annee = annee;
this.real = real;
},
decrire: function () {
var description = this.titre + "(" + this.annee + ")" + ", réalisé par " + this.real;
return description;
}
};
// Initial array of films
var films = [];
for (var i = 0; i < 4; i++) {
var film = Object.create(Film);
// Save user inputs
var titre = prompt("Film:");
var annee = prompt("année");
var real = prompt("real");
// Run init function for created
film.init(titre, annee, real);
// Save it to array of films
films.push(film);
}
films.forEach(function (film) {
// Run decrire() of each film in the array
console.log(film.decrire());
});

you're not closing your forEach:
films.forEach( function (film){
console.log( decrire() );
} );
EDIT: admitted, it only answer the error, not the rest of the question

Accessing Excel's Object Model from Javascript

I have excel as an activeX object in javascript. I seem to be missing something with reards to how to interact with the object model from there. My watch window shows the value of the "Value" property of the range I am trying to pull data from as "undefined" when I try to assign "range.Value" to an array.
Unfortunately I am unable to update the outdated browsers on my machine at work so I cannot upload pictures.
My script:
function open_files(A, B, C)
{
var excel = new ActiveXObject("Excel.Application");
excel.Visible=true;
excel.DisplayAlerts = false;
var wbA = excel.Workbooks.Open(document.getElementById(A).value);
var wbB = excel.Workbooks.Open(document.getElementById(B).value);
var wbC = excel.Workbooks.Open(document.getElementById(C).value);
excel.EnableEvents = false;
excel.ScreenUpdating = false;
excel.Calculation = -4135 //xlCalculationManual enumeration;
var wb_collection = [wbA, wbB, wbC];
excel.Application.Run("'" + wbA.name + "'" + '!update_links');
var CLIN_list = [wbA.Sheets("Control Form").Range("B62:B141").value(1)]
for (i = 0; i = CLIN_list.length; i++)
{
if (CLIN_list(i) > 0)
{
var CLIN_list_count = i
}
}
var decrement_range_start = wbA.Sheets("Fee & Decrement Table").Range("AJ14")
//for (i = 0; i < 80; i++){
//Sheets("Fee & Decrement Table").Cells(decrement_range_start.column+i
// Model Setup for VBA
wbA.Sheets("CONTROL FORM").Activate
wbA.Sheets("CONTROL FORM").OLEObjects("TextBox21").Object.Text = wbB.fullname
wbA.Sheets("CONTROL FORM").OLEObjects("TextBox22").Object.Text = wbC.fullname
excel.Application.Run("'" + wbA.name + "'" + '!Run_JPO');

I found an answer on another forum. A Range cannot be assigned directly to a js array, it has to be converted. The line below works to fill my CLIN_list variable.
var CLIN_list = new VBArray(wbA.Sheets("Control Form").Range("B62:B141").value).toArray();