diff --git a/src/DangerLinqFunction.ts b/src/DangerLinqFunction.ts
index de59a1a..0b6fa04 100644
--- a/src/DangerLinqFunction.ts
+++ b/src/DangerLinqFunction.ts
@@ -2,6 +2,7 @@ export enum DangerLinqFunction {
   Aggregate = "jreina/902da5688cb96d55af41e05c023b374e/raw/3866f8a3c86a26dc14832d42fe6ab062b9baa478/Aggregate.js",
   Aggregate1 = "jreina/0f4dab07c6be88054df6de0f350d3f76/raw/84116870af9aa3c42997c89b1240d4ad6d85c095/Aggregate1.js",
   Aggregate2 = "jreina/de6bfd33867a60ee9c06537b49dfa9f7/raw/45fe74147e683dd74daf29de7d038407a094f501/Aggregate2.js",
+  Any1 = "todo.js",
   Batch = "the-pat/d5a1bfca21be2beafad0a6a7559013e0/raw/a994a899302f07475ebb99041ac9d4c53aa81776/Batch.js",
   Batch1 = "the-pat/f7588fca09549c30de33808a900cc60f/raw/1532ea284bac98acd72a4ff3d49b203969def63d/Batch1.js",
   GroupBy = "jreina/655b2016649fcb644af3f73d6cbab699/raw/c7c24e39862e90d83c7ba410b72ef5d537e73d2e/GroupBy.js",
diff --git a/src/DangerLinqFunctionMapping.ts b/src/DangerLinqFunctionMapping.ts
index 8528f8f..98436b0 100644
--- a/src/DangerLinqFunctionMapping.ts
+++ b/src/DangerLinqFunctionMapping.ts
@@ -12,6 +12,9 @@ export const DangerLinqFunctionMapping = {
   [DangerLinqFunction.Aggregate1]: <T>(xs: Array<T>, reducer: (memo: T, val: T) => T): T => {
     throw new DontCallThisError();
   },
+  [DangerLinqFunction.Any1]: <T>(xs: Array<T>, predicate: (x: T) => boolean): boolean => {
+    throw new DontCallThisError();
+  },
   [DangerLinqFunction.Batch]: <T>(xs: Array<T>, size: number): Array<T> => {
     throw new DontCallThisError();
   },
diff --git a/src/index.ts b/src/index.ts
index 97dbdba..5406e18 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,6 +13,8 @@ export function DangerLinq(func: DangerLinqFunction.Aggregate): Promise<typeof D
 export function DangerLinq(func: DangerLinqFunction.Aggregate1): Promise<typeof DangerLinqFunctionMapping[DangerLinqFunction.Aggregate1]>;
 /** Applies an accumulator function over every element in the source array using the specified seed value as the initial memo value, and applies the result selector to the result. */
 export function DangerLinq(func: DangerLinqFunction.Aggregate2): Promise<typeof DangerLinqFunctionMapping[DangerLinqFunction.Aggregate2]>;
+/** Determines whether any element of a sequence satisfies a condition */
+export function DangerLinq(func: DangerLinqFunction.Any1): Promise<typeof DangerLinqFunctionMapping[DangerLinqFunction.Any1]>;
 /** Applies a function to batch the source sequence into sized buckets. */
 export function DangerLinq(func: DangerLinqFunction.Batch): Promise<typeof DangerLinqFunctionMapping[DangerLinqFunction.Batch]>;
 /** Applies a function to batch the source sequence into sized buckets and applies a projection to each bucket. */
@@ -25,7 +27,6 @@ export function DangerLinq(func: DangerLinqFunction.Map): Promise<typeof DangerL
 export function DangerLinq(func: DangerLinqFunction.SleepSort): Promise<typeof DangerLinqFunctionMapping[DangerLinqFunction.SleepSort]>;
 /**Filters a sequence of values based on a predicate */
 export function DangerLinq(func: DangerLinqFunction.Where): Promise<typeof DangerLinqFunctionMapping[DangerLinqFunction.Where]>;
-
 export async function DangerLinq(func: DangerLinqFunction) {
   // @ts-ignore
   if (cache.has(func)) {
diff --git a/test/any1.spec.ts b/test/any1.spec.ts
new file mode 100644
index 0000000..dd9dc8c
--- /dev/null
+++ b/test/any1.spec.ts
@@ -0,0 +1,54 @@
+import { expect } from "chai";
+import { DangerLinq } from "../src";
+import { DangerLinqFunction } from "../src/DangerLinqFunction";
+
+/**
+ * TODO
+ * Test cases:
+ * - Nonempty array, predicate matches an item in array
+ * - Nonempty array, predicate doesn't match an item in array
+ * - Empty array, predicate doesn't matter
+ * - Array is null, predicate doesn't matter
+ * - Array is undefined, predicate doesn't matter
+ * - Array is nonempty, predicate is null
+ * - Array is nonempty, predicate is undefined
+ */
+
+describe("DangerLinqFunction.Any", () => {
+  it("Should be a function", async () => {
+    const any = await DangerLinq(DangerLinqFunction.Any1);    
+    expect(any).to.be.a("function");
+  });
+
+  it("Should return true for a non empty list", async () => {
+    const any = await DangerLinq(DangerLinqFunction.Any1);
+    const input = [0, 1, 2, 3];
+    const actual = any(input);
+    const expected = true;
+
+    expect(actual).to.eql(expected);
+  });
+
+  it("Should return false for empty list", async () => {
+    const any = await DangerLinq(DangerLinqFunction.Any1);
+    const input: any[] = [];
+    const actual = any(input);
+    const expected = false;
+
+    expect(actual).to.eql(expected);
+  });
+
+  it("Should throw an error when null is passed in", async () => {
+    const any = await DangerLinq(DangerLinqFunction.Any1);
+
+    // @ts-ignore
+    expect(() => any(null)).to.throw();
+  });
+
+  it("Should throw an error when undefined is passed in", async () => {
+    const any = await DangerLinq(DangerLinqFunction.Any1);
+
+    // @ts-ignore
+    expect(() => any(undefined)).to.throw();
+  });
+});
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