Shawn

  • iOS, Implement Least Recently Used Cache

    iOS, Implement Least Recently Used Cache

    ✍️ Note Some codes are sourced from Holczer Balazs’s Udemy Course (https://www.udemy.com/course/algorithms-and-data-structures/learn/lecture/9779302#content). This post is for personal notes where I summarize the original contents to grasp the key concepts Least Recently Used Cache

  • iOS, General Programming Problems

    iOS, General Programming Problems

    ✍️ Note Some codes are sourced from Loony Corn’s Udemy Course (https://www.udemy.com/user/janani-ravi-2/). This post is for personal notes where I summarize the original contents to grasp the key concepts General Programming Problems Often coding interviews involve problems which do not have complicated algorithms or data structures – These are straight programming…

  • iOS, Combine Framework

    ✍️ Note Some codes and contents are sourced from Apple, WWDC and BigMountStudio. This post is for personal notes where I summarize the original contents to grasp the key concepts (🎨 some images I draw it) Overview The Combine framework provides a declarative approach for how your app processes events. Rather than potentially…

  • iOS, Graph Data Structure

    ✍️ Note Some codes and contents are sourced from Udemy. This post is for personal notes where I summarize the original contents to grasp the key concepts (🎨 some images I draw it) Graph What is a graph? Undirected Graph Undirected Graph Unconnected Graph Directed Graph Directed Acyclic Graph Graph Representation Graph Interface…

  • iOS, Heap Data Structure

    ✍️ Note Some codes and contents are sourced from Udemy. This post is for personal notes where I summarize the original contents to grasp the key concepts (🎨 some images I draw it) Priority Queue Binary Heap Shape Property, Height All nodes at Level H-1 nodes (9, 12, 11, 7) have to be…

  • iOS, Autorelease Pool

    ✍️ Note Some codes and contents are sourced from Apple’s official documentation. This post is for personal notes where I summarize the original contents to grasp the key concepts What is Autorelease Pool? An object that supports Cocoa’s reference-counted memory management system. An autorelease pool stores objects that are sent a release message…

  • iOS, File System

    ✍️ Note Some codes and contents are sourced from Apple’s official documentation. This post is for personal notes where I summarize the original contents to grasp the key concepts (🎨 some images I draw it) About the iOS File System For security purposes, an iOS app’s interactions with the file system are…

  • iOS, Stack and Queue

    ✍️ Note Some codes and contents are sourced from Udemy. This post is for personal notes where I summarize the original contents to grasp the key concepts (🎨 some images I draw it) Introduction You may think Stack and Queue is very basic structure and It’s very easy. Yes that’s true but…

  • iOS, App Architectures

    ✍️ Note Some codes and contents are sourced from Apple’s official documentation, google android official site and wikipedia. This post is for personal notes where I summarize the original contents to grasp the key concepts (🎨 some images I draw it) MVC: Model View Controller The Model-View-Controller (MVC) design pattern assigns objects…

  • iOS, Communicate with a Server

    ✍️ Note Some codes and contents are sourced from Apple’s official documentation, educative.io and mozilla. This post is for personal notes where I summarize the original contents to grasp the key concepts (🎨 some images I draw it) URLSession Network 101 If you want to learn more about network related topics,…