export const isNumber = (value: any) => { return typeof value === 'number'; }; export const isString = (value: any) => { return typeof value === 'string'; }; export const isBoolean = (value: any) => { return typeof value === 'boolean'; }; export const isDate = (value: any) => { return value instanceof Date; }; export const isNull = (value: any) => { return value === null; }; export const isUndefined = (value: any) => { return typeof value === 'undefined'; }; export const isFunction = (value: any) => { return typeof value === 'function'; }; export const isObject = (value: any) => { return typeof value === 'object'; }; export const isArray = (value: any) => { return Array.isArray(value); }; export const isEqual = (objA: any, objB: any): boolean => { if (objA === objB) { return true; } if (typeof objA !== 'object' || typeof objB !== 'object' || objA === null || objB === null) { return false; } const keysA = Object.keys(objA); const keysB = Object.keys(objB); if (keysA.length !== keysB.length) { return false; } for (const key of keysA) { if (!keysB.includes(key)) { return false; } if (!isEqual(objA[key], objB[key])) { return false; } } return true; };