Problem with .concat function

Problem with .concat function
0

Tell us what’s happening:
refer the code. the value of age is updating(concatinating) .why?
Your code so far


var globalArray = [5, 6, 3, 2, 9];
function nonMutatingSort(arr) {
// Only change code below this line
let age=[];

age.concat(arr);
console.log(arr)  // [ 5, 6, 3, 2, 9 ]
console.log(age)  // []
// Only change code above this line
}
nonMutatingSort(globalArray);

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Challenge: Return a Sorted Array Without Changing the Original Array

Link to the challenge:

Look at how .concat() works. How is the original array affected? What does it return?

1 Like

got it .thanks for the quick reply