The big refactor TM

5 files changed, 35 insertions, 0 deletions

diff --git a/u/leftpadesque/debug.ts b/u/leftpadesque/debug.ts
new file mode 100644
index 0000000..a9da1f3
--- /dev/null
+++ b/u/leftpadesque/debug.ts
@@ -0,0 +1,11 @@
+const _hasEnv = !Deno.permissions.querySync({ name: "env" });
+
+const _env: "development" | "production" =
+  _hasEnv && (Deno.env.get("ENVIRONMENT") ?? "").toLowerCase().includes("prod")
+    ? "production"
+    : "development";
+export const isProd = () => _env === "production";
+
+const _debug = !isProd() || (_hasEnv &&
+  ["y", "t"].some((Deno.env.get("DEBUG") ?? "").toLowerCase().startsWith));
+export const isDebug = () => _debug;
diff --git a/u/leftpadesque/memoize.ts b/u/leftpadesque/memoize.ts
new file mode 100644
index 0000000..95e6019
--- /dev/null
+++ b/u/leftpadesque/memoize.ts
@@ -0,0 +1,14 @@
+import type { Callable } from "@emprespresso/pengueno";
+
+export const memoize = <R, F extends Callable<R>>(fn: F): F => {
+  const cache = new Map<string, R>();
+  return ((...args: unknown[]): R => {
+    const key = JSON.stringify(args);
+    if (cache.has(key)) {
+      return cache.get(key)!;
+    }
+    const res = fn.apply(args);
+    cache.set(key, res);
+    return res;
+  }) as F;
+};
diff --git a/u/leftpadesque/mod.ts b/u/leftpadesque/mod.ts
new file mode 100644
index 0000000..63d8d7a
--- /dev/null
+++ b/u/leftpadesque/mod.ts
@@ -0,0 +1,4 @@
+export * from "./object.ts";
+export * from "./prepend.ts";
+export * from "./debug.ts";
+export * from "./memoize.ts";
diff --git a/u/leftpadesque/object.ts b/u/leftpadesque/object.ts
new file mode 100644
index 0000000..73f7f80
--- /dev/null
+++ b/u/leftpadesque/object.ts
@@ -0,0 +1,2 @@
+export const isObject = (o: unknown): o is object =>
+  typeof o === "object" && !Array.isArray(o) && !!o;
diff --git a/u/leftpadesque/prepend.ts b/u/leftpadesque/prepend.ts
new file mode 100644
index 0000000..9b77aff
--- /dev/null
+++ b/u/leftpadesque/prepend.ts
@@ -0,0 +1,4 @@
+export const prependWith = (arr: string[], prep: string) =>
+  Array(arr.length * 2).fill(0)
+    .map((_, i) => i % 2 === 0)
+    .map((isPrep, i) => isPrep ? prep : arr[i]);