feat: add a utility function to detect numeric values

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

@@ -0,0 +1,17 @@
+import { isNumber } from '../utils/number-utils';
+
+describe('Number Utils', () => {
+  describe('#isNumber', () => {
+    it('should return true if input is a numeric expression', () => {
+      expect(isNumber(0)).toBe(true);
+      expect(isNumber(0.15)).toBe(true);
+      expect(isNumber(2e8)).toBe(true);
+      expect(isNumber(Infinity)).toBe(true);
+
+      expect(isNumber('0')).toBe(true);
+      expect(isNumber('0.15')).toBe(true);
+      expect(isNumber('2e8')).toBe(true);
+      expect(isNumber('Infinity')).toBe(true);
+    });
+  });
+});

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

@@ -0,0 +1,4 @@
+export function isNumber(value: string | number): boolean {
+  /* tslint:disable-next-line:triple-equals */
+  return value == Number(value);
+}