More examples

Author: tshemsedinov

JavaScript/a-matrix.js

@@ -0,0 +1,25 @@
+'use strict';
+
+const matrix = [
+  [7, 10, 1, 5, 2],
+  [6, -1, 7, 2, 3],
+  [1, 2, 4, -8, 2],
+  [-6, 4, 8, 2, 0],
+];
+
+const max = (a, b) => a > b ? a : b;
+
+const res = matrix
+  .map(row => row.reduce(max))
+  .reduce((acc, rowMax) => acc + rowMax);
+
+console.log(res);
+
+let i, j, row, col;
+for (i in matrix) {
+  row = matrix[i];
+  for (j in row) {
+    col = row[j];
+    console.log(i, j, col);
+  }
+}

JavaScript/b-matrix-each.js

@@ -0,0 +1,14 @@
+'use strict';
+
+const matrix = [
+  [7, 10, 1, 5, 2],
+  [6, -1, 7, 2, 3],
+  [1, 2, 4, -8, 2],
+  [-6, 4, 8, 2, 0],
+];
+
+matrix.forEach((row, i) => {
+  row.forEach((col, j) => {
+    console.log(i, j, col);
+  });
+});

JavaScript/c-matrix-for-in.js

@@ -0,0 +1,17 @@
+'use strict';
+
+const matrix = [
+  [7, 10, 1, 5, 2],
+  [6, -1, 7, 2, 3],
+  [1, 2, 4, -8, 2],
+  [-6, 4, 8, 2, 0],
+];
+
+let i, j, row, col;
+for (i in matrix) {
+  row = matrix[i];
+  for (j in row) {
+    col = row[j];
+    console.log(i, j, col);
+  }
+}

JavaScript/d-reduce.js

@@ -0,0 +1,7 @@
+'use strict';
+
+let count = 0;
+const arr = [7, 10, 1, 5, 2];
+const sum = (acc, val) => (count++, acc + val);
+const res = arr.reduce(sum);
+console.log({ res, count });