Add files

src/helper/get-combinations.ts

@@ -0,0 +1,29 @@
+export const getCombinations = (values: Array<Array<number>>): Array<Array<number>> => {
+  if (!values.every((a) => a.length > 0)) {
+    return [];
+  }
+
+  const result: Array<Array<number>> = [];
+  const counters = values.map((_) => 0);
+
+  const increaseCounter = (i: number) => {
+    if (i >= counters.length) {
+      return false;
+    }
+
+    counters[i]++;
+
+    if (counters[i] >= values[i].length) {
+      counters[i] = 0;
+      return increaseCounter(i + 1);
+    }
+
+    return true;
+  };
+
+  do {
+    result.push(values.map((v, i) => v[counters[i]]));
+  } while (increaseCounter(0));
+
+  return result;
+};