[System Design] Database
Good Short Video: https://www.youtube.com/watch?v=W2Z7fbCLSTw&ab_channel=Fireship
Questions to think:
How to scale writes?
How to scale reads?
Ho
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[System Design] Cache
Cache
Caches can exist at all levels in architecture
Application Server Cache
Each time a request is made to the service, the node will quickly retur
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[Leetcode] Randomization
Reservoir SamplingVideo: https://www.youtube.com/watch?v=8Xj0ODE9mW0&ab_channel=TryandCatchJeeves
Given a stream of size N which is too large to f
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[Leetcode] Prefix Sum
Prefix Sum problem560. Subarray Sum Equals KLeetcode: https://leetcode.com/problems/subarray-sum-equals-k/
[Solution]
Use a hashmap to store {curSum:
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[Interview] Roblox
36. Valid SudokuLeetcode: https://leetcode.com/problems/valid-sudoku/
1234567891011121314151617def isValidSudoku(self, board: List[List[str]]) -> b
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[Docker] Kubernetes Basic
Concepts
Why Kubernete: manual deployment of containers is hard to maintain, error-prone and annoying.
Containers might crash/go down and need to be
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[Docker] Containers & Images
Based on Udemy Course: Docker & Kubernetes: The Practical Guide
Concepts
A image is a sharable package that can be used in multiple containers
doc
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[Terraform] Basic
Crash course: https://www.youtube.com/watch?v=SLB_c_ayRMo
Concepts
Provider: platforms the TF code will be based on. (AWS, Docker, etc)
Resources
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[Go] Concurrency
Why use concurrencyWhy Use parallel execution
More efficient
Some tasks must be performed sequentially
Not all tasks can be run parallelly
Parallel E
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[iOS] Automatic Reference Counting
SummaryARC allows swift to automatically reallocate resources.
Strong Reference Cycles Between Class InstancesIt’s possible to write code in which an
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