Add nested loops task

Exercises/6-matrix.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const max = matrix => {
+ // Use nested for loop to find max value in 2d matrix
+ // For example max([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
+ // should return 9
+};
+
+module.exports = { max };

Exercises/6-matrix.test

@@ -0,0 +1,13 @@
+({
+ name: 'max',
+ length: [220, 300],
+ cases: [
+ [[[10]], 10],
+ [[[1, 2], [3, 4], [5, 6]], 6],
+ [[[-1, 1], [2, -1], [-1, 0]], 2],
+ ],
+ test: max => {
+ const src = max.toString();
+ if (!src.includes('for (')) throw new Error('Use for loop');
+ }
+})

Solutions/6-matrix.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const max = matrix => {
+ let value = matrix[0][0];
+ for (let i = 0; i < matrix.length; i++) {
+ const row = matrix[i];
+ for (let j = 0; j < row.length; j++) {
+ const cell = row[j];
+ if (value < cell) value = cell;
+ }
+ }
+ return value;
+};
+
+module.exports = { max };