CODEBASE: Expand lint rules, and Aliases are stored as maps (#501)

src/utils/helpers/ArrayHelpers.ts

@@ -0,0 +1,27 @@
+import { Truthy } from "lodash";
+
+/**
+ * Returns the input array as a comma separated string.
+ *
+ * Does several things that Array.toString() doesn't do
+ *  - Adds brackets around the array
+ *  - Adds quotation marks around strings
+ */
+export function arrayToString(a: unknown[]): string {
+  const vals: unknown[] = [];
+  for (let i = 0; i < a.length; ++i) {
+    let elem: unknown = a[i];
+    if (Array.isArray(elem)) {
+      elem = arrayToString(elem);
+    } else if (typeof elem === "string") {
+      elem = `"${elem}"`;
+    }
+    vals.push(elem);
+  }
+
+  return `[${vals.join(", ")}]`;
+}
+
+export function FilterTruthy<T>(input: T[]): Truthy<T>[] {
+  return input.filter(Boolean) as Truthy<T>[];
+}