Use Higher-Order Functions map, filter, or reduce to Solve a Complex Problem

JavaScript
1

Tell us what’s happening:
I am stuck on this challenge despite looking at the solution I cant seem to solve the problem, Where could I be going wrong ? I am having the same identical code like with the solutions provided but it does not get the job done kindly I need your help on this guys.

Your code so far


const squareList = (arr) => {
// Only change code below this line
return arr;
const squareList = (arr) => {
const positiveIntegers = arr.filter(num => {
  return num >= 0 && Number.isInteger(num);
});
const squaredIntegers = positiveIntegers.map(num => {
  return num ** 2;
});
return squaredIntegers;
};
// Only change code above this line
};

const squaredIntegers = squareList([-3, 4.8, 5, 3, -3.2]);
console.log(squaredIntegers);

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Challenge: Use Higher-Order Functions map, filter, or reduce to Solve a Complex Problem

Link to the challenge:
https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/functional-programming/use-higher-order-functions-map-filter-or-reduce-to-solve-a-complex-problem

2

everything after the return statement is not executed. Your function first line is return arr. So arr is returned, and the function stops.

1 Like
3

Like ieahleen said, your return statement means nothing else inside that function is being executed.

You also have unnecessarily repeated the function definition “squareList” and created an entirely new function inside the outer “squareList” function, making it somewhat confusing to read. So I can understand where you were confused, haha!!

Your inner squareList function looks fine though, so just copy that whole function, move it outside of the “outer” squareList function, and delete that outer one. Then it should work.

1 Like
4

Thanks I did the changes and worked perfectly

1 Like
5

Thank you for your assistance I was able to solve it

6

I’m still not getting this. So what should the answer look like? Please help

7

Hi, where exactly are you stuck on, the answer should look more like this;

const squareList = (arr) => {

// Only change code below this line

const positiveIntegers = arr.filter(num => {

return num >= 0 && Number.isInteger(num);

});

const squaredIntegers = positiveIntegers.map(num => {

return num ** 2;

});

return squaredIntegers;

return arr;

};

// Only change code above this line

const squaredIntegers = squareList([-3, 4.8, 5, 3, -3.2]);

1 Like
8

You legend! Thanks so much! I must be tired, because I’ve been banging my head over this all day!