170th Commit

src/page-24/2535. Difference Between Element Sum and Digit Sum of an Array/differenceOfSum.test.ts

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+import { differenceOfSum } from './differenceOfSum';
+
+describe('2535. Difference Between Element Sum and Digit Sum of an Array', () => {
+  test('differenceOfSum', () => {
+    expect(differenceOfSum([1, 15, 6, 3])).toBe(9);
+    expect(differenceOfSum([1, 2, 3, 4])).toBe(0);
+  });
+});

src/page-24/2535. Difference Between Element Sum and Digit Sum of an Array/differenceOfSum.ts

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+type DifferenceOfSum = (nums: number[]) => number;
+
+/**
+ * Accepted
+ */
+export const differenceOfSum: DifferenceOfSum = (nums) => {
+  // Calculate the element sum
+  const elementSum = nums.reduce((sum, num) => sum + num, 0);
+
+  // Calculate the digit sum
+  const digitSum = nums.reduce((sum, num) => {
+    const digits = String(num).split('');
+    const digitSumForNum = digits.reduce((digitSum, digit) => digitSum + Number(digit), 0);
+    return sum + digitSumForNum;
+  }, 0);
+
+  // Return the absolute difference
+  return Math.abs(elementSum - digitSum);
+};