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Articles tagged with #lld
Bridge Design Pattern DefinitionBridge decouples an abstraction from its implementations, so that both can very independently.1. Abstraction : High level layer ( eg: Car )2. Implementations : Low level layer ( eg: Engine ) 馃幆 The Problem Without Brid...
Payment Gateway system Requirements1. Should support multiple providers ( Paytm, razorpay etc.. )2. we can easily add new gateways in future3. There should be standard payment flow with required validators.4. Have error handling and retires mechanism...
Chain of Responsibility Pattern DefinitionAllow an object to pass a request along a chain of potential handlers, each handler in the chain decided either to process the request or pass it to the next handler. 馃彠 Real-World Example: ATM Cash Dispenser...
Proxy Design Pattern DefinitionThe Proxy pattern provides a surrogate or placeholder for another object to control access to it. Types1. Virtual Proxy2. Protection Proxy3. Remote Proxy 馃摝 1. Virtual Proxy Use Case: Lazy-load a heavyweight resource ...
Template Design Pattern DefinitionTemplate design pattern design the skeleton of an algorithm, for an operation defining some steps to subclasses, Template method let subclasses redefine certain steps of an algorithm without changing the algorithm st...
Composite Design Pattern DefinitionComposite pattern composes object into tree like structure representing a part - whole hierarchy. It let client treats individual object and composition of object uniformly. Design File System When you have a tree-l...