Develop Reference

JS select value of multidimentional objects

So, I have following js setup:
var NAMES = [];
function INFO(id,first,middle,last){
var newMap = {};
newMap[id] = [first, middle, last];
return newMap ;
}
Then,
Then I get following result:
I am trying to select the individual value like below:
For example, I want to select "Sean" under "185"
var f = '185';
select_data = NAMES[f][0];
But I keep getting an error saying that "0" is not an identifier.
I am bit confused. Can someone help me out how to select the value properly?

You need to get the object inside the array first, so it should be as follows
var f = '185';
select_data = NAMES[0][f][0];
// -------^----- getting first element from array, which is the object

Google Sites Listitem

I am working with the google sites list item.
The classes are Here and Here
I have been able to iterate through the columns and put all of the column headers in to one array with the following code.
//Global
var page = getPageByUrl(enter URL here)
var name = page.getName();
function getInfo() {
var columns = page.getColumns();
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
}
Now I want to be able to get each row of the listitem and put it in its own array.
I can add the variable
function getInfo() {
var columns = page.getColumns();
var listItems = page.getListItems();//new variable
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
}
Now that I have the variable the output is [ListItem, ListItem, ListItem, ListItem]
So I can use a .length and get a return of 4.
So now I know I have 4 rows of data so based on my wants I need 4 arrays.
Small interjection here, Not a coder by trade but code as a precursor to wants becoming needs.
A buddy of mine who is a JS coder by trade showed me this code which does work. With the logger added by me.
for (var i in listItems) {
if (listItems.hasOwnProperty(i)) {
item = listItems[i];
for (var x = 0; x < columnList.length; x++) {
attrib = item.getValueByName(columnList[x]);
Logger.log("Logging value of get list page get value by name = " + columnList[x] + " " + attrib);
}
}
}
Which brings the total code to
var name = page.getName();
var listItems = page.getListItems();
var listCount = listItems.length
var listList = [];
var columns = page.getColumns();
var name = columns[0].getName();
var item, attrib = 0;
var columnList = [];
Logger.log(listItems);
Logger.log(name + " was last updated " + page.getLastUpdated());
Logger.log(name + " was last edited " + page.getLastEdited());
var listCount = 0;
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
Logger.log(columnList);
// Get index of Due Date
var dueDateValue = columnList.indexOf("Due Date");
Logger.log("The index of due date is " + dueDateValue);
for (var i in listItems) {
if (listItems.hasOwnProperty(i)) {
item = listItems[i];
for (var x = 0; x < columnList.length; x++) {
attrib = item.getValueByName(columnList[x]);
Logger.log("Logging value of get list page get value by name = " + columnList[x] + " " + attrib);
}
}
}
}`
Forgive the above code as it has been a bit of a sketch pad trying to work this out.
I am a bit behind on understanding what is happening here
for (var i in items) { // This is for each item in the items array
if (items.hasOwnProperty(i)) {
if items is an array, how can we use has own property? Doesn't that belong to an object? Does an array become an object?
My questions are two category fold.
Category # 1
What is happening with the hasOwnProperty?
-Does the array become an object and thus can be passed to .hasOwnProperty value
Category # 2
Is this the only way to take the values from the listitem and populate an array
- If it is, is there some way to delimit so I can pass each row into it's own array
- If it isn't , why does it work with the hasOwnProperty and why doesn't it work without it in the example below
for (var i in listItems) {
for (var y = 0; y < columnList.length; y++) {
item = listItems[i];
listList = item.getValueByName(columnList[x]);
Logger.log("Logging my version of list naming " + listList);
}
In which I get a "Invalid argument: name (line 41" response. Highlighting the
listList = item.getValueByName(columnList[x]);
Not looking for a handout but I am looking to understand the hasOwnPropertyValue further.
My current understanding is that hasOwnValue has to do with prototyping ( vague understanding ) which doesn't seem to be the case in this instance
and it has to depend on a object which I described by confusion earlier.
To clarify my want:
I would like to have each row of listitems in its own array so I can compare an index value and sort by date as my current column headers are
["Project", "Start Date" , "End Date"]
Any and all help is much appreciated for this JS beginner of 2 weeks.

An array can be inside of an object as the value of a member:
{"myFirstArray":"[one,two,blue]"}
The above object has one member, a name/value pair, where the value of the member is an array.
Here is a link to a website that explains JSON.
Link To JSON.org
JSON explained by Mozilla
There are websites that will test the validity of an object:
Link to JSONLint.com
An array has elements, and elements in an array can be other arrays. So, there can be arrays inside of arrays.
.hasOwnProperty returns either true or false.
Documentation hasOwnProperty
Interestingly, I can use the hasOwnProperty method in Apps Script on an array, without an error being produced:
function testHasProp() {
var anArrayTest = [];
anArrayTest = ['one', 'two', 'blue'];
Logger.log(anArrayTest);
var whatIsTheResult = anArrayTest.hasOwnProperty('one');
Logger.log(whatIsTheResult);
Logger.log(anArrayTest);
}
The result will always be false. Using the hasOwnProperty method on an array doesn't change the array to an object, and it's an incorrect way of using Javascript which is returning false.
You could put your list values an object instead of an array. An advantage to an object is being able to reference a value by it's property name regardless of where the property is indexed. With an array, you need to know what the index number is to retrieve a specific element.
Here is a post that deals with adding properties to an object in JavaScript:
StackOverflow Link
You can either use dot notation:
objName.newProperty = 'newvalue';
or brackets
objName["newProperty"] = 'newvalue';
To add a new name/value pair (property) to an object.

adding input value in multidimensional array?

I am facing problem in java-script problem as
I have to collect all subrole from screen whenever user focus out from input field.this is my code
var subrole_id = [];
$("ul :input[class^='sub']").live('focusout', function() {
var get_id = $(this).attr('class').split("_");
var ids = get_id[2];
var ids_index = get_id[3];
subrole_id[ids][ids_index] = this.value;
});
but this is giving error
TypeError: subrole_id[ids] is undefined
subrole_id[ids][ids_index] = this.value;
Actually I want to collect value of subrole input field and add them in array with index ids one by one and before adding that value in array I have to check whether that present value is present in array or not if yes then do not add and give error.
Please suggest.

There isn't a true multidimensional array in javascript, just an array of array, so you have to create the subArray:
subrole_id[ids]=subrole_id[ids]||[];
subrole_id[ids][ids_index] = this.value;

minimized code for arrays in js

I have three arrays in js and now i want to add empty check on them..so please help me in short/ minimized code for the empty array check.My js code is
var selectedfirst = jQuery('select#frsts').val();
var selectedsecond = jQuery('select#secnds').val();
var selectedthird = jQuery('select#thirds').val();
var lastfindal = selectedfirst.concat(selectedsecond); // Array concatination
var getfinal = lastfindal.concat(selectedthird); // Array concatination
I know how can i process empty check on single array but due to contcatenation the code goes longer . i contcate first array to second then concate to third.I want to concate array when they are not empty. like selectedfirst.length > 0.if anyone not understand fully i will provide more detail on request.Thanks in advance

After working i fix the issue.I created new array like
var hege = [];
if (selectedfirst!== null) {
alert('not emtpy');
var hege = hege.concat(selectedfirst);
}
the same condition for other too.

Can anyone help with this (Javascript arrays)?

Hi I am new to Netui and Javascript so go easy on me please. I have a form that is populated with container.item data retuned from a database. I am adding a checkbox beside each repeater item returned and I want to add the container item data to an array when one of the checkboxes is checked for future processing.
The old code used Anchor tag to capture the data but that does not work for me.
<!--netui:parameter name="lineupNo" value="{container.item.lineupIdent.lineupNo}" />
here is my checkbox that is a repeater.
<netui:checkBox dataSource="{pageFlow.checkIsSelected}" onClick="checkBoxClicked()" tagId="pceChecked"/>
this is my Javascript function so far but I want to a way to store the container.item.lineupIdent.lineupNo in the array.
function checkBoxClicked()
{
var checkedPce = [];
var elem = document.getElementById("PceList").elements;
for (var i = 0; i < elem.length; i ++)
{
if (elem[i].name == netui_names.pceChecked)
{
if (elem[i].checked == true)
{
//do some code. }
}
}
}
I hope this is enough info for someone to help me. I have searched the web but could not find any examples.
Thanks.

var checkedPce = new Array();
//some other code
checkedPce[0] = stuff_you_want_to_add

If you merely want to add a value to an array, you can use this code:
var array = [];
array[array.length] = /* your value */;
You may need to use a dictionary approach instead:
var dictionary = {};
function yourCode(element) {
var item = dictionary[element.id];
if (item == null) {
item = /* create the object */;
dictionary[element.id] = item;
}
// Use the item.
}