feat: working through all the algos i'll need

src/__tests__/BinarySearchArray.ts

@@ -0,0 +1,13 @@
+import binary_fn from "@code/binary_search_array"
+
+test("binary search array", function() {
+
+    const foo = [1, 3, 4, 69, 71, 81, 90, 99, 420, 1337, 69420];
+    expect(binary_fn(foo, 69)).toEqual(true);
+    expect(binary_fn(foo, 1336)).toEqual(false);
+    expect(binary_fn(foo, 69420)).toEqual(true);
+    expect(binary_fn(foo, 69421)).toEqual(false);
+    expect(binary_fn(foo, 1)).toEqual(true);
+    expect(binary_fn(foo, 0)).toEqual(false);
+});
+

src/global.d.ts

@@ -1,3 +1,8 @@
+declare type Point = {
+    x: number;
+    y: number;
+}
+
 declare interface List<T> {
     get length(): number;
     removeAt(index: number): T | undefined;