Function

Question

what this command do arr.indexof(x)

Answer 1

https://code.sololearn.com/WkfdZcGaZ34a/?ref=app

Answer 2

9 is not present in the array.

(index <0)? 1: 0; is a ternary operator.
Some people consider it as shorthand if/else.

What the code is saying
if (index < 0){
result = 1;
}else{
result = 0;
}

Answer 3

finds the index value of the argument in an array.

Answer 4

I don't understand look this code

Answer 5

What is the output of this code?
var arr = [-1, 0, 1, 2, 3, 4, 5, 6, 7, 8];
var index = arr.indexOf(9);
var result = index < 0 ? 1 : 0;
console.log(result);

Answer 6

thanks

Answer 7

a[I] showing the value of the index
a.indexof(x) showing the index of the value

Answer 8

thank you so much for help

Answer 9

😂😂glad to help👍.