I have created an array:

myarray = new Array();
myarray['test_a'] = "test a";
myarray['test_b'] = "test b";

Now I would like to remove the entry with index "test_b". I tried this way:

var del = "test_b";
for(key in myarray){
   if(key==del){
      myarray.splice(key,1);
   }
}

However it does not work. No error. I just checked in firebug the entries for the array and mentioned that "test_b" still exists. What is wrong? Thanks for help.

I have created an array:

myarray = new Array();
myarray['test_a'] = "test a";
myarray['test_b'] = "test b";

Now I would like to remove the entry with index "test_b". I tried this way:

var del = "test_b";
for(key in myarray){
   if(key==del){
      myarray.splice(key,1);
   }
}

However it does not work. No error. I just checked in firebug the entries for the array and mentioned that "test_b" still exists. What is wrong? Thanks for help.

• javascript
• arrays

Share Improve this question Follow asked Oct 3, 2013 at 2:47 zulukzuluk 1,57788 gold badges3030 silver badges5353 bronze badges

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2 Answers 2

Sorted by: Reset to default 5

Arrays are meant to have numeric indices, you want an object, then you can simply use delete:

var obj = {};
obj.test_a = "test a";
obj.test_b = "test b";

var del = "test_b";
delete obj[del];

console.log(obj); //=> { test_a: "test_a" }

splice works on numerical index, what you have is that you have added a property to the array object. You can just do a delete to delete the property from the array object.

  delete myarray[del];

Demo

if you are just defining properties on an array and using it just as an object then better consider using an object instead of creating an array to store properties