Develop Reference

jQuery Id Selection and Dynamic Arrays

I have some code I'm struggling with. The good news is the code working as intended for a single instance; after some thought I've decided to feature multiple of these image selectors on a page. This works but the ugly approach of duplicating the code doesn't scale well (e.g. what if you want 50 of these on there?) The snag I've hit is how I can refer to a specific array. Is an array even an ideal solution for this?
The Objective
I have a series of images that a user may select from, up to X amount. The selected image ids are stored in an array and the image is added to a "selected images pool". This occurs by using an onClick for the slider, I obtain the Id from the element attributes. This is where I'm getting stuck.
var dataArray = $(this).closest("[id^=carousel]").data('array');
var slideCounter = $(this).closest("[id^=carousel]").data('counter');
slideCounter = dataArray.length;
The slideCounter returns the length of the string, not the array elements. How can I tell this code to refer to a particular array? See the fiddle for a better idea of the markup and code: jsFiddle
I have no doubt that there is a better approach. I'm relatively new to front end work, I'd appreciate any insights, I've burnt some brain cells on this, thanks!

From looking at your HTML, it looks like when you do this:
var dataArray = $(this).closest("[id^=carousel]").data('array');
what you're trying to do is to read the name of an array with .data() and then somehow turn that name (which is a string) into the array that's in your variable. My guess is that there's probably a better way to structure your code rather than putting javascript variable names in your HTML. I'd probably put a key name in the HTML and then store the arrays in an object where you can access them by that key name at any time.
Without trying to refactor your code, here's an idea for what you were trying to accomplish:
If selectedSlidesIdArray1 is a global variable, then you can do this:
var dataArray = window[$(this).closest("[id^=carousel]").data('array')];
Using the [stringVariable] notation on an object, lets you access a property by a literal string or a variable that contains a string. Since all global variables are also properties on the window object, you can do it this way for global variables.
If selectedSlidesIdArray1 is not a global variable, then you should probably put it in an object and then you can do this:
var dataArray = yourObj[$(this).closest("[id^=carousel]").data('array')];

Instead of trying to translate an arbitrary string into a JavaScript variable of the same name, why not just use another array? You can have nested arrays, which is to say an array of arrays.
Thus, instead of selectedSlidesIdArray1, selectedSlidesIdArray2, etc., you would have one selectedSlidesIdArray with sub-arrays, which you could then pull the index for using a data attribute.

Getting Hash and Storing in Variable

I'm trying to take the hashed value from an object. What I'm basically doing is this:
target = $('a[href^="#products"]');
targetHashed = target.hash;
$targetHashed = $(targetHashed);
console.log(targetHashed);
I'm putting the reference in "target", then getting the hashing and everything following it with ".hash" then converting the variable that contains the hashed value "targetHashed" to an object so I can do things like getting the offset, etc. Problem is that "targetHashed" is outputting undefined whenever I try to append .hash to it. Anyone know where I'm going wrong?

If you want to get the value of the href attribute of the selected elements you need to use attr so your second line would look something like.
targetHashed = target.attr('href');
But that only selects the first element, if you want to use all of them then you'll need to loop through that array.

AngularJS - define an object but don't run ngRepeat

I'm having a problem where I need to build a content type. First, I define my model. I'm using Drupal so I need to send values nested in things like:
field_whatever.und[0].value = "";
Say I define an array for images:
$scope.field_my_images = {"und": [{}]};
Because I have a blank array:
<div ngRepeat="image in field_my_images.und"><img ng-src="{{image.url}}" /></div>
Will print the first array element blank. As I push new objects to field_my_images, it works correctly except for the first blank element.
What's the proper way to do this?
I can add details and be more specific as needed....

shouldn't you initialize your scope with this instead?
$scope.field_my_images = {"und": []};
Otherwise, you don't have an empty array, you have an array with an empty object.

append object to innerHTML and get that object from innerHTML

here is an example in jsfiddle.
I want to know if I can append a javascript object to innerHTML, that get that object again from innerHTML as object.
something like,
alert((this.innerHTML).html);
that's just an example, don't ask me why do you need this?
I'm trying to edit an existing code, and I have to do this so.
I have to transfer an object via div.innerHTML.

Check this jsfiddle. In it, I add the object to the div as a 'data-'-attribute, using JSON to convert it to a string. After that, adding some comment to the div triggers the DOMSubtreeModified-handler, in which the 'html'-part of the object is retrieved and alerted. It that something to work with?

In this case, quite possible your only option is to convert your object to string and then put that into the element. (This is done by looping through the key, values building the string as you go.)
You would reverse the process to convert it back into an obj.
I know some javascript libary's have helper functions to make this process very simple.
You could try adding the data directly onto the dom element, rather than as its content..
tempDiv.objData = myObject;

It was suggested to use JSON, but no code. So:
function addObjAsJSON(el, obj) {
el.setAttribute('data-myJSON', encodeURIComponent(JSON.stringify(obj)));
}
function getObjAsJSON(el) {
return JSON.parse(decodeURIComponent(el.getAttribute('data-myJSON')));
}
That should allow you to add anything as a serialised object, then get it back. You should add some error checking to make it robust though (e.g. check that you get a string back from the call to getAttribute).
For user agents that don't have built-in JSON support, see json.org which has a link in the javascript section to json.js.

handling splice with associative arrays in javascript

I have an array called as wcs declared using var wcs= new Array();.
I do add items like this, wcs[indx] = value. where i will keep on changing the indx value, so at times, my array will be looking like this
wcs[2] ='a'; wcs[5]=')';
when i call the splice method on this array, all the created indices are re-indexed, meaning they become reset from 0...
how to avoid this in javascript & jQuery

Write your own splice method that works the way you want. If you specify the input, processing and expected output, you might get some help with that.
If you simply want a copy of the array, you may be after the concat method.