Add and remove elements form array in javascript

Note:I have coded using typescript but javascript functions remains same

Declaration of Array:

numberoftasks: string[];

Adding elemnts in Array using push function

addtask() {

console.log('Adding Task: ' + this.form.value.task);

this.numberoftasks.push(this.form.value.task);

console.log(this.numberoftasks);

}

Output:["user1", "admin", "kavitha"]

Splice function with deletecount and start index 

deletetask(index) {

console.log('Deleting' + index);

this.numberoftasks.splice(index,1);

this.form.controls['task'].reset();

}

I am passing index as 0  in deletetask function and below is output.

Splice function Without deletecount

deletetask(index) {

console.log('Deleting' + index);

this.numberoftasks.splice(index);

this.form.controls['task'].reset();

}

If you wont pass any delete count then it will consider index as start index of elements needs to be deleted and it will delete all elements coming after this index.

e.g. if  index is 0  deletetask(0)

then it will delete entire array.


e.g. if  index is 1  deletetask(1)

then it will delete Elmets coming after index 1.

so out put will be like
["user1"]