CODEWITHSUNDEEP
javascriptjqueryarraysjson
nderjung
nderjung

Reputation: 1617

jQuery delete array index

I'm having trouble deleting/removing an item from an Array in jQuery. I've run the results in console.log() and it shows up as an Object. I've created a function which returns a json string and then I parses it, an example below:

var ret = jQuery.parseJSON($.return_json(data));

It works nicely, however, I am running an $.each loop which removes items from that array/object. 

var old = $("element").find("li[rel=item]");
$.each(old, function(index, value) {
    ret.splice($(value).attr("id"), 1);
});

Above, I am searching for elements with attribute rel = item. The same element contains an id which is related to the index of the function which returns the json parsed variable.

I ran Developers Tools in Google Chrome to see the error and it prints:

Uncaught TypeError: Object #<Object> has no method 'splice'

Any words of guidance will be much appreciated. Thanks.

Upvotes: 2

Views: 11029

Answers (3)

gen_Eric
gen_Eric

Reputation: 227240

splice is only a method of arrays, not objects. ret in this case, is an object, not an array.

If you are trying to remove specific elements from an object, you can do this:

$("element").find("li[rel=item]").each(function(i,v){
   delete ret[v.id];
});

ps. You can use .each instead of $.each.

If you really want to make the object into an array, you can simply loop through it and push the elements into an array.

var obj = {"1":"item 1", "2": "item 2", "3": "Item 3"};
var arr = [];
for(i in obj){
  if(obj.hasOwnProperty(i)){
    arr.push(obj[i]);
  }
}

Upvotes: 3

Jacob Swartwood
Jacob Swartwood

Reputation: 4075

It seems like ret is not actually an array (and likely an object (ex: {someName: "someVal"}) instead).

I'm also making an assumption that you mean for $(value).attr("id") to be a string identifier like someName in the object example above. If that is the case and you are working with an object and you do have the appropriate property identifier, then luckily there is an easier solve than splice.

Try:

$("element").find("li[rel=item]").each(function() {
    delete ret[$(this).attr("id")];
});

Upvotes: 4

George Reith
George Reith

Reputation: 13476

ret is the JSON object containing the array, and you can't splice it. You need to reference whatever you called the array within the object and splice that.

(Would help if you posted the code where you define the array).

Upvotes: 0

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