Undefined: Not deleting javascript array

Question

I have ran the simple javascript code. where i want to delete an element from the array. it is not being completely deleted although it remains undefined after deleting the element itself. it should not leave any gap in the array.

var arr = ['dog',34,36.33,'apple',,,];
alert(arr);
delete arr[2];
alert(arr);

i have check the syntax of delete is correct. Am i doing wrong. if it is so, please find the soln. i want complete array free from deleted elements.

delete does delete properties, not splice items out of an array. — Bergi
– Bergi, Commented Aug 11, 2014 at 16:32
here delete is operator. var arr = [2,34,36.33,'apple']; arr.slice(2,1); alert(arr); here it does not give the arr free from arr[2] — user3905993
– user3905993, Commented Aug 11, 2014 at 16:35

j08691 · Accepted Answer · 2014-08-11 16:34:23Z

2

Use .splice() instead:

var arr = ['dog',34,36.33,'apple'];
console.log(arr); // ["dog", 34, 36.33, "apple"] 
arr.splice(2,1);
console.log(arr)  // ["dog", 34, "apple"]

answered Aug 11, 2014 at 16:34

j08691

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j08691 Over a year ago

splice() not slice()

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