Attempt to support TypeScript for coding challenges

I was a bit weaker than I expected to be in my most recent interview using
TypeScript. To improve, I think I'd like to attempt solving some of the
InterviewCake.com questions using TypeScript.

If you've read the previous commits, the inspiration for `run` arose because I
need to call `npx ts-code <file>`, which is easy enough to remember, but I'd
still rather just call `run <file>`.

6 files changed, 107 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index cda768f08fe4..115d4f1a0b16 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,3 +29,4 @@ __pycache__
 /monzo_ynab/ynab/fixture.json
 /monzo_ynab/monzo/fixture.json
 /monzo_ynab/kv.json
+node_modules/
diff --git a/deepmind/part_two/.envrc b/deepmind/part_two/.envrc
new file mode 100644
index 000000000000..b80e28b4b815
--- /dev/null
+++ b/deepmind/part_two/.envrc
@@ -0,0 +1,2 @@
+source_up
+eval "$(lorri direnv)"
diff --git a/deepmind/part_two/package-lock.json b/deepmind/part_two/package-lock.json
new file mode 100644
index 000000000000..94c89c5979c4
--- /dev/null
+++ b/deepmind/part_two/package-lock.json
@@ -0,0 +1,73 @@
+{
+  "name": "deepmind-part-two",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "arg": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
+      "integrity": "sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==",
+      "dev": true
+    },
+    "buffer-from": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
+      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
+      "dev": true
+    },
+    "diff": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
+      "integrity": "sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==",
+      "dev": true
+    },
+    "make-error": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.5.tgz",
+      "integrity": "sha512-c3sIjNUow0+8swNwVpqoH4YCShKNFkMaw6oH1mNS2haDZQqkeZFlHS3dhoeEbKKmJB4vXpJucU6oH75aDYeE9g==",
+      "dev": true
+    },
+    "source-map": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+      "dev": true
+    },
+    "source-map-support": {
+      "version": "0.5.16",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.16.tgz",
+      "integrity": "sha512-efyLRJDr68D9hBBNIPWFjhpFzURh+KJykQwvMyW5UiZzYwoF6l4YMMDIJJEyFWxWCqfyxLzz6tSfUFR+kXXsVQ==",
+      "dev": true,
+      "requires": {
+        "buffer-from": "^1.0.0",
+        "source-map": "^0.6.0"
+      }
+    },
+    "ts-node": {
+      "version": "8.6.2",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-8.6.2.tgz",
+      "integrity": "sha512-4mZEbofxGqLL2RImpe3zMJukvEvcO1XP8bj8ozBPySdCUXEcU5cIRwR0aM3R+VoZq7iXc8N86NC0FspGRqP4gg==",
+      "dev": true,
+      "requires": {
+        "arg": "^4.1.0",
+        "diff": "^4.0.1",
+        "make-error": "^1.1.1",
+        "source-map-support": "^0.5.6",
+        "yn": "3.1.1"
+      }
+    },
+    "typescript": {
+      "version": "3.7.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.5.tgz",
+      "integrity": "sha512-/P5lkRXkWHNAbcJIiHPfRoKqyd7bsyCma1hZNUGfn20qm64T6ZBlrzprymeu918H+mB/0rIg2gGK/BXkhhYgBw==",
+      "dev": true
+    },
+    "yn": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
+      "dev": true
+    }
+  }
+}
diff --git a/deepmind/part_two/package.json b/deepmind/part_two/package.json
new file mode 100644
index 000000000000..c9ef307ca0ee
--- /dev/null
+++ b/deepmind/part_two/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "deepmind-part-two",
+  "version": "1.0.0",
+  "description": "Practicing coding interview questions",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "William Carroll",
+  "license": "MIT",
+  "devDependencies": {
+    "ts-node": "^8.6.2",
+    "typescript": "^3.7.5"
+  }
+}
diff --git a/deepmind/part_two/reverse-string-in-place.ts b/deepmind/part_two/reverse-string-in-place.ts
new file mode 100644
index 000000000000..628b95a6bf91
--- /dev/null
+++ b/deepmind/part_two/reverse-string-in-place.ts
@@ -0,0 +1,6 @@
+function main(x: number) {
+  console.log(x + 1);
+  console.log("Hello, world.");
+}
+
+main(10);
diff --git a/deepmind/part_two/shell.nix b/deepmind/part_two/shell.nix
new file mode 100644
index 000000000000..606dd7167f7c
--- /dev/null
+++ b/deepmind/part_two/shell.nix
@@ -0,0 +1,10 @@
+{ pkgs ? import <nixpkgs> {}, ... }:
+
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    nodejs
+    python3
+    go
+    goimports
+  ];
+}