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Simplifying Scalability: When to Use a Reverse Proxy, API Gateway, or Load Balancer

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  In today’s microservices and distributed architectures, understanding terms like reverse proxy, API gateway, and load balancer is essential. Although these components might seem similar, they each serve a distinct purpose in managing, routing, and securing traffic between clients and servers. In this blog, we’ll break down each one, look at how they work, and provide examples with Node.js code to demonstrate their usage in real-world scenarios. What is a Reverse Proxy? A  reverse proxy  is a server that sits between client requests and backend servers, forwarding client requests to backend services. It’s responsible for hiding internal server details, distributing load, and enhancing security. Key Features of a Reverse Proxy: Hides backend server details, improving security. Routes requests to different servers based on conditions. Caches content to improve performance. Example Scenario with Code Suppose we have a backend with two microservices: Service A  running ...
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Stop the Bugs! Why == and === in JavaScript Aren't the Same

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  In JavaScript, comparing values is a frequent operation, and understanding the difference between  ==  (loose equality) and  ===  (strict equality) is crucial to  avoid unexpected behavior   in your code. While both operators are used for comparisons, they handle type-checking differently, which impacts performance and functionality. Let’s dive into how each works, their internal mechanisms, and when to use each to ensure your code remains clean and bug-free. ==  (Loose Equality) The  ==  operator is known as  loose equality  because it checks only if the values on both sides are “loosely equal.” When you use  == , JavaScript will try to  coerce  (or convert) the data types of the two values to make them compatible before comparing them. If the values are not the same type, JavaScript attempts to convert one or both values so that the comparison can proceed. How  ==  Works The internal mechanism of...
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Understanding the Difference Between var, let, and const in JavaScript

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JavaScript offers three ways to declare variables:  var ,  let , and  const . Each has its own rules, behavior, and use cases, impacting scope, redeclaration, initialization, and more. Knowing the distinctions among these keywords is essential for writing robust, clean, and error-free JavaScript code. This guide will explain the differences in terms of scope, declaration, redeclaration, initialization, and hoisting, with clear examples to illustrate each point. Scope: Where is the Variable Accessible? In JavaScript,  scope  defines where variables can be accessed within the code. JavaScript has three types of scope: Global Scope Function Scope Block Scope 1. Global Scope A variable has  global scope  if it’s declared outside any function or block. Global variables are accessible from any part of the code, including inside functions or blocks. var ,  let , and  const  can all have global scope if declared outside a function or block, but...
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