Posts
  • Jul 4, 2022, 04:43
    React
  • Jun 28, 2022, 02:59
    MDX
    • [Engineering]
      • MDX: using React in Markdown
      • MJML:better at creating email templates
  • Jun 23, 2022, 02:59
    ts-everyday-types
    • [Engineering] TS everyday types
      • Primitive types
      • Object types
      • Union types
      • Interface
      • Type Assertions
      • Literal types
      • Keywords: narrowing, contextual typing, infer typing, literal inference, alias just alias - point into the same type,
  • Jun 22, 2022, 10:08
    system-view-of-software-pipeline
  • Jun 20, 2022, 03:48
    interpolation-extrapolation
    • [Mathematics] Interpolation vs Extrapolation
      • Interpolation for find past unknown values, where extrapolation for future forecast.
      • Interpolation methods: linear, polynomial, spline.
      • Extrapolation methods: linear, polynomial, conic
  • Jun 15, 2022, 02:41
    alt-text
  • Jun 14, 2022, 02:38
    marcel
  • Jun 9, 2022, 03:51
    tech-reading
  • Jun 8, 2022, 04:39
    typescript-for-js-programmer
    • [Engineering] Typescript for JS Programmer
      • Type by Inference: TS will define type of a variable by assigned value
      • Interfaces vs Types: using interface to define type
      • Unions: a variable can have multiple types 
          function getLength(obj: string | string[])
      • Generics: can use Type as generic Type and assign a specific type to Type in declare 
          interface Container<Type> {
    push: (obj: Type) => void;
    pop: () => Type;
  }

  declare const stringContainer: Container<string>;
  stringContainer.push("abc");
      • Duck Typing = Structural Typing = shape-matching: 
          interface Point {
    x: number;
    y: number;
  }

  const point = { x: 1, y: 2 }; // auto match to Point type
  const rect = { x: 1, y: 2, width: 10, height: 30 }; // auto match to Point type (kind of casting to Point)
  const color = { hex: "#FFFFFF" }; // failed-matched to Point type
  • Jun 8, 2022, 02:39
    portfolio-ideas and 1x.engineer
  • Oct 29, 2019, 06:46
    2019-10-29
    • [Algorithm] Binary Tree:
      • Definition
      • Inorder, preorder, postorder travesal a tree
      • Level order travesal: breath first search
      • Solve some problems: maximum depth, symmetric tree, path sum
      • Build a tree from inorder, preorder and inorder, postorder
  • Oct 14, 2019, 15:39
    2019-10-14
    • [Algorithm] First read of Introduction to Algorithms, 3rd Edition
      • A algorithm = procedure by getting input and give out output
      • Terminologies: algorithm, data stucture, problem, instances of problem, …
      • A algorithm running must be terminated and giving out correct outputs ontime
      • Algorithms’ applications in real world and its need for engineering
      • Efficiency: computing time + space. Compare with a faster computer, a much slower computer can give faster output with a better algorithm that have smaller complexity
      • NP-complete problem and approximate algorithm approach
  • Feb 23, 2019, 07:26
    2021-02-23

    [Engineering] How to schedule bug fixing?

    The workflow: notice => first inspection => schedule the fix => Fix => Report

    • For Shared platform
      • (Re-)Raise the awareness of the important of sentry priority
      • We need a sentry coordinator.
    • Microservice
      • Each team should setup the slack channel to filter the team related bugs
    • General
      • We need a clear commitment from PO & Squad team.