I am unable to organize an array

Question

I am unable to organize an array

I stumbled upon a discussion about clearing an array in JavaScript, but unfortunately I can't participate there. So, here's my query: I have the following code snippet:

sumarray.length=0;
 sumarray = [];
  for (var i=0; i<3; i++)
      sumarray.push(i);
  console.log('***1***:',sumarray.length, sumarray);
  var t;
  while (console.log('***2***: t:',t=sumarray.pop()) || t!==undefined) {
      console.log('***3***:',sumarray.length,sumarray);
    }
 console.log('*****4***: ',sumarray.length, sumarray);

After running this code, here is what I observed in the log:

I did not assign the global sumarray array to any other variable. How can I effectively clean out all unwanted elements from it? Any insights would be greatly appreciated.

javascript arrays

Answer 1

Answer №1

To easily remove elements from an array in JavaScript, simply use the delete keyword as shown below:

Example:

var items = ["a","b","c"];

then

  for(var i=0; i < items.length; i++){
    delete items[i];
    }

--Update

The delete keyword will render the occupied length of the array to be undefined while keeping the indexes intact.

If you want to completely remove elements by index, you can utilize the pop method like this:

for(var i=0; i < items.length; i++){
        items.pop(i);
        }

Answer 2

To easily remove elements from an array in JavaScript, simply use the delete keyword as shown below:

Example:

var items = ["a","b","c"];

then

  for(var i=0; i < items.length; i++){
    delete items[i];
    }

--Update

The delete keyword will render the occupied length of the array to be undefined while keeping the indexes intact.

If you want to completely remove elements by index, you can utilize the pop method like this:

for(var i=0; i < items.length; i++){
        items.pop(i);
        }

I am unable to organize an array

Answer №1

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