need help javascript array = [] and how to output name of variable in array with value

Question

I have a question about array as below

array = {}

and

array = [];

its same or not?.

also wish to ask

array { ID1 : "apple", ID2 : "Orange"}

and

array [ID1 : "apple", ID2 : "Orange"];

which is correct?.

now i coding my code with below and need your help to teach me about ARRAY.

var Store = [ store = 0, store1 = 0, store2 = 0,store3 = 0,store4 = 0];
var stock1 = 77,stock2 = 47,stock3 = 37,stock4 = 27,stock5 = 17;

for(i=0;i<stock1;i++){
store[0]++
}
var Sum_1 = Store;
document.getElementById('show1').innerHTML=Sum_1;

output will be

77

my question is how to i output it become

store = 77
store1 = 47
store2 = 37

Most with ID or Name together and value.

Thank you so much.

Answer 1

[] are used for a literal Array declaration, {} for a literal Object declaration.

Arrays are initialized without a value by using:

var my_array = [];

and with values:

var my_array = [1, 2, 3];

Note that you cannot set the index by this. You would have to do:

var my_array = [];
my_array["one"] = 1;
// etc.

You can then get "1" back by my_array["one"]

If you want to get the actual index name or "key" then you will need to do some trickery:

var outputString = "";

function ListAll()
{
    for(var key in my_array)
    {
        if(my_array.hasOwnProperty(key)) // Check if the key is actually a property (index)
        {
            outputString += key + " = " + my_array[key]; // add to string
        }
    }

    alert(outputString); // or assign the string to a div, whatever you need
}

in this example, key would be the index and my_array[key] the actual value