Finders Keepers (func(num))

JavaScript
#1

can anyone explain me this (func(num)) and this also num => num % 2 === 0

function findElement(arr, func) {
let num = 0
if(func(num)){
return num
}
}

findElement([1, 2, 3, 4], num => num % 2 === 0);

console.log(findElement([1, 2, 3, 4],2))

#2 
num => num % 2 === 0

That’s an arrow-function. It’s a short way to write a function in JS - you got the input on the left num and the output on the right num % 2 === 0.
So findElement is called by giving it this arrow-function as definition for func (second argument) and within findElement, the provided arrow-function is now named func and is called with num like a normal function.

1 Like
#3

Thankyou very much jagaya

#4

This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.