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Comparing Two Different Arrays
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Comparing Two Different Arrays
Jul 23
・1 min read
- Second we will simply compare two arrays and return a new array with any items only found in one of the two given arrays, but not both. Remember the keyword "not both".
- Problem Below:
function arrays(arr1, arr2) {
}
arrays([1, 2, 4, 5], [1, 2, 3, 4, 5]);
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Answer:
function arrays(arr1, arr2) {
let merge = arr1.concat(arr2);
return merge.filter(function(num) { // <--- num are all the numbers in merge. [1, 2, 4, 5, 1, 2, 3, 4, 5]
if (arr1.indexOf(num) === -1 || arr2.indexOf(num) === -1) {
return num;
}
})
}
console.log(diffArray([1, 2, 4, 5], [1, 2, 3, 4, 5])); // will display [3]
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- We're just checking the two arrays and return a new array that contains only the items that are not in either of the original arrays. In this case 3.
- What we did was merge the list to make it easy to compare and used filter to get the new array in which you will need to create a callback function.
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