Remove values from array javascript

Today we are going to see how we can Delete data from array using Javascript.

So here we have an array

let players = [
            'Rom', 
                'Roger',
                'Andrew',
                'Mark',
                'Albert',
                'John',
                'Steve',
                'Jack',
                'Manu',
                'Jacky',
                'Tom'
            ];

Remove 1st value from array in javascript

For that we can use javascript function "shift", Here is how we do it

// Removing 1st value from array

players.shift();

So output will look something like this

Roger, Andrew, Mark, Albert, John, Steve, Jack, Manu, Jacky, Tom

Now let's see how we can

Remove the last element from array using javascript

In this case we use javascript function "pop" like this

// Remove the last value from array

players.pop();

Output will have names printed like this

Rom, Roger, Andrew, Mark, Albert, John, Steve, Jack, Manu, Jacky, 

Now what if you want to delete some value from array but from the middle somewhere. In this case we use another javascript function "splice". Here is how

Let's say we need to remove value "John" in given array, For that we need to check where "John" value present in array(At what index). We can find location of value in array using javascript function "indexOf". Here is How

players.indexOf('John');

// It will return 5  as John is in array at 5th value(Note: array index start from 0). So 
// name "Rom" is at index 0 and "Roger" is at index 1

Now we use "splice method"

Here

// Remove specific value from array

players.splice(players.indexOf('John'), 1);

1st argument is (Index from where you want to remove data)

2nd Argument is How many values to remove

So in our example we are using index of "John" and passing "1" as second argument. So it removes only one value from array which is "John" in this case.

Output will be like this

Rom, Roger, Andrew, Mark, Albert, Steve, Jack, Manu, Jacky, Tom, 

Note: Data returns does not have "John" in it.

Hope this helps