feat(core): add generateHash utility fn

npm/ng-packs/packages/core/src/lib/tests/generator-utils.spec.ts

@@ -0,0 +1,10 @@
+import { generateHash } from '../utils';
+
+describe('GeneratorUtils', () => {
+  describe('#generateHash', () => {
+    test('should generate a hash', async () => {
+      const hash = generateHash('some content \n with second line');
+      expect(hash).toBe(1112440527);
+    });
+  });
+});

npm/ng-packs/packages/core/src/lib/utils/generator-utils.ts

@@ -1,6 +1,19 @@
+// tslint:disable: no-bitwise
+
 export function uuid(a?: any): string {
   return a
-    ? // tslint:disable-next-line: no-bitwise
-      (a ^ ((Math.random() * 16) >> (a / 4))).toString(16)
+    ? (a ^ ((Math.random() * 16) >> (a / 4))).toString(16)
     : ('' + 1e7 + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, uuid);
 }
+
+export function generateHash(value: string): number {
+  let hashed = 0;
+  let charCode: number;
+
+  for (let i = 0; i < value.length; i++) {
+    charCode = value.charCodeAt(i);
+    hashed = (hashed << 5) - hashed + charCode;
+    hashed |= 0;
+  }
+  return hashed;
+}