Okay it fetches the right answer for me but doesnt strict equal check if the values are the same too?
i mean x^0 would be 1 and ex could be 6 or 14 and then i checked (x^0) === x so typewise it matches but valuewise it doesnt so how did i clear?
Your code so far
const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34];
const squareList = (arr) => {
"use strict";
const squaredIntegers = arr.filter(x=>(x^0)===x).map(x=>x*x);
return squaredIntegers;
};
// test your code
const squaredIntegers = squareList(realNumberArray);
console.log(squaredIntegers);
Your browser information:
User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36.
Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6/write-higher-order-arrow-functions
sorry actually i came back to the test and sent over the code.i made the edits so that it gives the correct answer.please explain how did the filter function work
Did you copy the code without knowing exactly what it was doing?
x^0 is not 1 usually, as ^ is not the power operator
^ is the bitwise OR operation, which in js also had the side effect of coercion into a 32 bit signed integer
It’s a neat trick to compare that result to the value itself to check if it’s an integer, but it’s not entirely robust (fails e.g. when x is larger than a 32 bit int) and relatively pointless when we have Number.isInteger
Number.isInteger is a function to check if it is an int?I copied the code thinking that its a power operator
hi Hamzah, it is easy to check what Number.isInteger does. Just google it and then you will get multiple hits from google including the MDN specification for this function (which describes it in full).
Get into the habit of googling things that are well known (like what does this function do) because it is a part of your everyday life as a software developer.