fix(compat/find): convert fromIndex to an integer

benchmarks/bundle-size/find.spec.ts

@@ -9,6 +9,6 @@ describe('find bundle size', () => {
 
   it('es-toolkit/compat', async () => {
     const bundleSize = await getBundleSize('es-toolkit/compat', 'find');
-    expect(bundleSize).toMatchInlineSnapshot(`8295`);
+    expect(bundleSize).toMatchInlineSnapshot(`8555`);
   });
 });

src/compat/array/find.spec.ts

@@ -52,7 +52,7 @@
   });
 
   it(`find should provide correct \`predicate\` arguments for arrays`, () => {
     let args: any;
     const array = ['a'];
 
     find(array, function () {
@@ -70,7 +70,7 @@
   });
 
   it(`find should provide correct \`predicate\` arguments for objects`, () => {
     let args: any;
     const object = { a: 1 };
 
     // eslint-disable-next-line @typescript-eslint/ban-ts-comment
@@ -92,6 +92,14 @@
     expect(find(objects, { b: 2 }, 4)).toBe(undefined);
   });
 
+  it('find should coerce `fromIndex` to an integer', () => {
+    const array = [1, 2, 3, 1, 2, 3];
+
+    expect(find(array, x => x === 1, 2.7)).toBe(1);
+    expect(find(array, x => x === 1, -2.7)).toBe(undefined);
+    expect(find(array, x => x === 1, -0.5)).toBe(1);
+  });
+
   it('should return `undefined` when provided `null` or `undefined`', () => {
     expect(find(null, 'a')).toBe(undefined);
     expect(find(undefined, 'a')).toBe(undefined);

src/compat/array/find.ts

@@ -4,6 +4,7 @@
 import { ObjectIterateeCustom } from '../_internal/ObjectIteratee.ts';
 import { ObjectIteratorTypeGuard } from '../_internal/ObjectIterator.ts';
 import { iteratee } from '../util/iteratee.ts';
+import { toInteger } from '../util/toInteger.ts';
 
 /**
  * Finds the first element in an array-like object that matches a type guard predicate.
@@ -103,9 +104,9 @@
  * console.log(result); // { id: 1, name: 'Alice' }
  */
 export function find<T>(
   source: ArrayLike<T> | Record<any, any> | null | undefined,
   _doesMatch:
     | ((item: T, index: number, arr: any) => unknown)
     | Partial<T>
     | [keyof T, unknown]
     | PropertyKey = identity,
@@ -114,6 +115,8 @@
   if (!source) {
     return undefined;
   }
+
+  fromIndex = toInteger(fromIndex);
   if (fromIndex < 0) {
     fromIndex = Math.max(source.length + fromIndex, 0);
   }