Delete data from json array

Question

I am trying to remove a piece of a data from a json array. For example I have this array

var favorites =    {
        \"userID\": \"12345678\",
        \"favorit         


        

Answer 1

To unset any variable use the delete statement:

delete favorites.favorites[1].items[1]

This is correct way, and it will work, but if your goal is to preserve indexes in order, then your way with the splice method is the way to go:

favorites.favorites[1].items.splice(1,1);

The above will remove one element (second parameter) starting at 1st index (first parameter).

So to be clear: to remove the last element use this:

var arr = favorites.favorites[1].items;
arr.splice(arr.length - 1, 1);

See your code on JsFiddle.

You can take additional measures to protect the code in case the array is not set or empty:

var arr = favorites.favorites[1].items;
if ( arr && arr.length ) {
    arr.splice(arr.length - 1, 1);
}