LeetCode - 1502. Can Make Arithmetic Progression From Sequence

Solution

var canMakeArithmeticProgression = function(arr) {
    arr.sort((a, b) => a - b)

    let diff = arr[1] - arr[0]

    for(let i=2; i<arr.length; i++) {
        if(arr[i] - arr[i-1] !== diff) return false
    }

    return true
};

Explanation