Hello, experience coders, help me with this,

Question

function addOne(str){
return str.split("").filter(function(str){
if (str/1 == str || str/0 == 1) {
return 55;
}
}).join("");
}

console.log(addOne("Helloworld0123456"));

I am returning 55 to the filter function why is the code giving me the right answer.

Answer 1

You mixed up filter and map

55 has a boolean value of true, so the digits are all kept.

Answer 2

there is no return when the character is string

Answer 3

filter method does not store the returned value, it stores the array item when the returned value has a boolean value of true.

Answer 4

Gordon No, I wanted to use filter only.
If the Boolean is true, it should return all the value, i.e string and numbers, why it is returning only the numbers??

Answer 5

Gordon because the if condition inside the callback only check for the number value,
My doubt is inside the callback function I am returning 55, why isn't it is giving me 55 back?

Answer 6

Gordon okay thank you.