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Tableau Javascript API

Can you explain the functions below:
viz = new tableau.Viz(containerDiv, url, options);
function listenToMarksSelection() {
viz.addEventListener(tableau.TableauEventName.MARKS_SELECTION, onMarksSelection);
}
function onMarksSelection(marksEvent) {
return marksEvent.getMarksAsync().then(reportSelectedMarks);
}
function reportSelectedMarks(marks) {
var html = "";
for (var markIndex = 0; markIndex < marks.length; markIndex++) {
var pairs = marks[markIndex].getPairs();
html += "<b>Mark " + markIndex + ":</b><ul>";
for (var pairIndex = 0; pairIndex < pairs.length; pairIndex++) {
var pair = pairs[pairIndex];
html += "<li><b>Field Name:</b> " + pair.fieldName;
html += "<br/><b>Value:</b> " + pair.formattedValue + "</li>";
}
}
}

This function just listen the selected mark
This one throw the selection in reportSelectedMarks
It take the marks and write it in an HTML file in a '<'li'>'.
The fieldname would probably be a String and in the value it depend what you are workin with.
So basically these functions would be useful to dynamically print a selected mark on a graph or something like that and print a fielname and a value for that one.

JavaScript Array & Global Variable Reference

I am trying to reference a global variable's value using my array output but I am unsure how to do that. I want to make these references outside the function as I will need to create many functions that use these variables.
Ignore the PFGetValue part, I need to use that for the program I am coding in. There will be many more dd_meg_x but this is just to show you what I'm doing. Currently, this will return the correct the text "dd_meg_x" - but I want to then reference the variable defined above. So for example, if the result in the array is dd_meg_1, I want the output to be "M Energy 16"
var dd_meg_1 = "M Energy 16";
var dd_meg_2 = "Ulra Energy";
var dd_meg_3 = "Another Option Here";
function canOrderMeg1() {
var brand = "meg";
var arrayLength = 21;
var canArray = [];
var variableName;
for (i = 0; i <= arrayLength; i++) {
variableName = ("dd_" + brand + "_" + i);
if (PFGetValue(variableName) === "Y") {
canArray.push(variableName);
}
canArray.join(", ");
}
return canArray[0];
}
function canOrderMeg2() {
var brand = "meg";
var arrayLength = 21;
var canArray = [];
var variableName;
for (i = 0; i <= arrayLength; i++) {
variableName = ("dd_" + brand + "_" + i);
if (PFGetValue(variableName) === "Y") {
canArray.push(variableName);
}
canArray.join(", ");
}
return canArray[1];
}

Try
return eval('string output code');
So this would look like
return eval(array output);

Try this:
var dd_meg_1 = "M Energy 16";
var dd_meg_2 = "Ulra Energy";
var dd_meg_3 = "Another Option Here";
function canOrderMeg1() {
return ["dd_meg_1", "dd_meg_2", "dd_meg_3"];
}
for(let i = 0; i < canOrderMeg1().length; i++){
if(typeof canOrderMeg1()[i] !== "undefined") {
console.log(window[canOrderMeg1()[i]]);
}
}

JS missing ) in parenthetical (line #88)

I'm writing a program in JS for checking equal angles in GeoGebra.
This is my first JS code, I used c# formerly for game programming.
The code is:
var names = ggbApplet.getAllObjectNames();
var lines = new Set();
var angles = new Set();
var groups = new Set();
for(var i=0; i<names.length; i++)
{
if(getObjectType(names[i].e)==="line")
{
lines.add(names[i]);
}
}
for(var i=0;i<lines.size;i++)
{
for(var j=0;j<i;j++)
{
var angle = new Angle(i,j);
angles.add(angle);
}
}
for(var i=0;i<angles.size;i++)
{
var thisVal = angles.get(i).value;
var placed = false;
for(var j=0;j<groups.size;j++)
{
if(groups.get(j).get(0).value===thisVal)
{
groups.get(j).add(angles.get(i));
placed = true;
}
}
if(!placed)
{
var newGroup = new Set();
newGroup.add(angles.get(i));
groups.add(newGroup);
}
}
for(var i=0;i<groups.size;i++)
{
var list="";
for(var j=0;j<groups.get(i).size;j++)
{
list = list+groups.get(i).get(j).name;
if(j != groups.get(i).size-1)
{
list = list+",";
}
}
var comm1 = "Checkbox[angle_{"+groups.get(i).get(0).value+"},{"+list+"}]";
ggbApplet.evalCommand(comm1);
var comm2 = "SetValue[angle_{"+groups.get(i).get(0).value+"}+,0]";
ggbApplet.evalCommand(comm2);
}
(function Angle (i, j)
{
this.lineA = lines.get(i);
this.lineB = lines.get(j);
this.name = "angleA_"+i+"B_"+j;
var comm3 = "angleA_"+i+"B_"+j+" = Angle["+this.lineA+","+this.lineB+"]";
ggbApplet.evalCommand(comm3);
var val = ggbApplet.getValue(this.name);
if(val>180)
{val = val-180}
this.value = val;
ggbApplet.setVisible(name,false)
});
function Set {
var elm;
this.elements=elm;
this.size=0;
}
Set.prototype.get = new function(index)
{
return this.elements[index];
}
Set.prototype.add = new function(object)
{
this.elements[this.size]=object;
this.size = this.size+1;
}
It turned out that GeoGebra does not recognize Sets so I tried to make a Set function.
Basically it collects all lines into a set, calculates the angles between them, groups them and makes checkboxes to trigger visuals.
the GeoGebra functions can be called via ggbApplet and the original Workspace commands via ggbApplet.evalCommand(String) and the Workspace commands I used are the basic Checkbox, SetValue and Angle commands.
The syntax for GeoGebra commands are:
Checkbox[ <Caption>, <List> ]
SetValue[ <Boolean|Checkbox>, <0|1> ]
Angle[ <Line>, <Line> ]
Thank you for your help!

In short, the syntax error you're running to is because of these lines of code:
function Set {
and after fixing this, new function(index) / new function(object) will also cause problems.
This isn't valid JS, you're likely looking for this:
function Set() {
this.elements = [];
this.size = 0;
}
Set.prototype.get = function(index) {
return this.elements[index];
};
Set.prototype.add = function(object) {
this.elements[this.size] = object;
this.size = this.size + 1;
};
Notice no new before each function as well.
I'm not sure what you're trying to accomplish by creating this Set object though - it looks like a wrapper for holding an array and its size, similar to how something might be implemented in C. In JavaScript, arrays can be mutated freely without worrying about memory.
Here's an untested refactor that removes the use of Set in favour of native JavaScript capabilities (mostly mutable arrays):
var names = ggbApplet.getAllObjectNames();
var lines = [];
var angles = [];
var groups = [];
for (var i = 0; i < names.length; i++) {
if (getObjectType(names[i].e) === "line") {
lines.push(names[i]);
}
}
for (var i = 0; i < lines.length; i++) {
for (var j = 0; j < i; j++) {
angles.push(new Angle(i, j));
}
}
for (var i = 0; i < angles.length; i++) {
var thisVal = angles[i].value;
var placed = false;
for (var j = 0; j < groups.length; j++) {
if (groups[j][0].value === thisVal) {
groups[j].push(angles[i]);
placed = true;
}
}
if (!placed) {
groups.push([angles[i]]);
}
}
for (var i = 0; i < groups.length; i++) {
var list = "";
for (var j = 0; j < groups[i].length; j++) {
list += groups[i][j].name;
if (j != groups[i].length - 1) {
list += ",";
}
}
var comm1 = "Checkbox[angle_{" + groups[i][0].value + "},{" + list + "}]";
ggbApplet.evalCommand(comm1);
var comm2 = "SetValue[angle_{" + groups[i][0].value + "}+,0]";
ggbApplet.evalCommand(comm2);
}
function Angle(i, j) {
this.name = "angleA_" + i + "B_" + j;
var comm3 = "angleA_" + i + "B_" + j + " = Angle[" + lines[i] + "," + lines[j] + "]";
ggbApplet.evalCommand(comm3);
var val = ggbApplet.getValue(this.name);
if (val > 180) {
val -= 180;
}
this.value = val;
ggbApplet.setVisible(name, false);
}
Hopefully this helps!

Your function definition is missing the parameter list after the function name.
Also, you're initializing the elements property to an undefined value. You need to initialize it to an empty array, so that the add method can set elements of it.
function Set() {
this.elements=[];
this.size=0;
}

How to save this in a JS variable?

I would like to know how to save the output of this into a "var a="
navigator.plugins.refresh(false);
var numPlugins = navigator.plugins.length;
for (var i = 0; i < numPlugins; i++){
var plugin = navigator.plugins[i];
if (plugin) {
document.write(plugin.name + plugin.description + plugin.filename)
}
}

Declare a outside of the loop and define it as an empty string, then append results to it as you go:
navigator.plugins.refresh(false);
var numPlugins = navigator.plugins.length;
var a = '';
for (var i = 0; i < numPlugins; i++){
var plugin = navigator.plugins[i];
if (plugin) {
a += plugin.name + plugin.description + plugin.filename;
}
}
You may want to use an array of strings though, since you could have many plugins:
navigator.plugins.refresh(false);
var numPlugins = navigator.plugins.length;
var a = [];
for (var i = 0; i < numPlugins; i++){
var plugin = navigator.plugins[i];
if (plugin) {
a.push(plugin.name + plugin.description + plugin.filename);
}
}
EDIT If you need to hash a into something:
var hash = yourMd5Function(a);
Or for the second example:
var b = a.join(','); // "plugin1,plugin2,..." for example
var hash = yourMd5Function(b);

Spliting String and getting appropriate value in JavaScript

I have a string where |||| means next to it is the directory. ||| means the user is allowed to access this directory and || means the files allocated to these users follow.
I need to find allocated file names of a specific user from this string. I have tried to split the string and assign values to an array but I am not able to get the result I'm looking for.
This is the string:
||||Root|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,||||1400842226669|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,testTask1_20140528135944.xlsx,testTask2_20140528140033.xlsx,||||1401191909489|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,testTask1_20140528135944.xlsx,testTask2_20140528140033.xlsx,LimitTest_20140528164643.xlsx,
And here is my attempt:
function getData() {
var user = 'km11285c';
var value = "||||Root|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,||||1400842226669|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,testTask1_20140528135944.xlsx,testTask2_20140528140033.xlsx,||||1401191909489|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,testTask1_20140528135944.xlsx,testTask2_20140528140033.xlsx,LimitTest_20140528164643.xlsx,";
var users = null;
var files = null;
var Dir = value.split("||||");
var arrayLength = Dir.length;
for (var i = 0; i < arrayLength; i++) {
users = Dir[i].split("|||");
}
return users;
}
console.log(getData());
and the jsFiddle

I changed your jsfiddle example a bit so maybe you need to change the code here and there, but something like this should work:
function buildTree(data) {
var tree = [];
var dirs = data.split("||||");
// Remove the first entry in the array, since it should be empty.
dirs.splice(0, 1);
for (var i = 0; i < dirs.length; ++i) {
var tempArray = dirs[i].split("|||");
var dirName = tempArray[0];
var usersAndFiles = tempArray[1];
tempArray = usersAndFiles.split("||");
var users = tempArray[0];
var files = tempArray[1];
var treeDir = { name: dirName };
treeDir.users = users.split(",");
treeDir.files = files.split(",");
tree.push(treeDir);
}
return tree;
}
function getData() {
var user = 'km11285c';
var value="||||Root|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,||||1400842226669|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,testTask1_20140528135944.xlsx,testTask2_20140528140033.xlsx,||||1401191909489|||adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,km11285c,km61052,km61639c,adil001,kl04707c,km47389,km58184,km61052,kq61023c,||LimitTest_20140528164643.xlsx,testTask2_20140528140033.xlsx,testTask1_20140528135944.xlsx,testTask2_20140528140033.xlsx,LimitTest_20140528164643.xlsx,";
var tree = buildTree(value);
for (var i = 0; i < tree.length; ++i) {
var dir = tree[i];
if (dir.users.indexOf(user) >= 0) {
console.log("User '" + user + "' has access to directory '" + dir.name + "', which contains these files: " + dir.files.join(","));
}
}
}
getData();