1502-Can-Make-Arithmetic-Progression-From-Sequence.js

/**
 * @param {number[]} arr
 * @return {boolean}
 */
const canMakeArithmeticProgression = (arr) => {
    arr.sort((a, b) => a - b);
    const diff = arr[1] - arr[0];

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

    return true;
};