How to properly check if index exists, then use index to get value, then delete index & value from array javascript/jquery

Question

I know the title was a mouthful, but describes what I need to do here. I will admit I'm having a lot of trouble figuring this out!

I'm trying to create a discount calculator and this is my first time using arrays.

Here's the code I have so far...

    dTrackerArray = [];
    //Create Array

    dTrackerArray.push( [var1, var2] );
    //Add Variables to Array

    var check = $.inArray(var1, dTrackerArray);
    // Checking to see if variable exists, keeps returning -1!!!

    alert(JSON.stringify(dTrackerArray));
    // Even though I have this right under it which alerts the array clearly showing var 1 and var 2 exist!

Once I've figured out how to properly check the array, I'd like to retain the value of the pair (in a variable perhaps), and then remove the pair from the array.

I'm sorry If this was a little hard to read or understand!

Answer 1

You're creating a multidimensional array ( [var1, var2] becomes an object within the dTrackerArray array.)

Try pushing var1 and var2 separately.

 dTrackerArray.push(var1);
 dTrackerArray.push(var2);

Answer 2

You are adding an array that contains var1 and var2 to the dTrackerArray array.

Use this syntax instead:

dTrackerArray.push(var1);
dTrackerArray.push(var2);

// Or this syntax
dTrackerArray.push(var1, var2);

// Or this syntax
dTrackerArray = [ var1, var2 ];

Here's a working fiddle to demonstrate.