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1. SpreadWithTypeofGuard SpreadWithTypeofGuard

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   const val1 = {

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       test1: 1,

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       test2: 2,

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   }

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   const result = { ...(typeof val1 === 'object' ? val1 : {})}

2. Function overload Function overload

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   // Overload signatures

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   function greet(person: string): string;

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   function greet(persons: string[]): string[];

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   // Implementation signature

3. proxyValidator proxyValidator

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    const validator = {

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      set: function(obj, prop, value) {

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        if (prop === 'age' && typeof value !== 'number') {

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          throw new Error('Age must be a number');

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        }

4. lookup table lookup table

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   const I18N_PREFIX = 'form.formValidation';

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   export enum RequestStatus {

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       PENDING = 'pending',

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       SUCCESS = 'success',

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       ERROR = 'error',