I ran across a paradox where sorting arrays works for number or number string values only. Here is the example:
const sortArr = (a, b) => a[1] - b[1];
const arr1 = [['two', '2'], ['one', '1'], ['three', '3']];
const arr2 = [['WA', 'Washington'], ['NC', 'North Carolina'], ['PA', 'Pennsylvania']];
let sortedArr1 = arr1.sort(sortArr);
let sortedArr2 = arr2.sort(sortArr);
console.log('sortedArr1', sortedArr1); // returns sorted array
console.log('sortedArr2', sortedArr2); // returns original array (not sorting)Can someone help figure out the right ways how to sort arr2 by second values correctly? Thank you!
Subtraction only works as the comparison function when you're comparing numbers. You need a comparison function that works with both numbers and strings.
function sortArr(a, b) {
if (a == b) {
return 0;
else if (a < b) {
return -1;
} else {
return 1;
}
}