Tell us what’s happening:
Solved the challenge but looking at other solutions found this:
what are the dots before diff
function for?
//f. return itemsPresentOnlyInOneOfTheArrays
function diffArray(arr1, arr2) {
return [...diff(arr1, arr2), ...diff(arr2, arr1)];
function diff(a, b) {
return a.filter(item => b.indexOf(item) === -1);
}
}
console.log(diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]));
Your code so far
function diffArray(arr1, arr2) {
var newArr = [];
newArr = arr2.filter(item => arr1.indexOf(item) == -1)
.concat(arr1.filter(item => arr2.indexOf(item) == -1))
return newArr;
}
console.log(diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]));
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.
Challenge: Diff Two Arrays
Link to the challenge:
https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/diff-two-arrays