∫ntegrabℓε ∂iﬀerentiαℓs

unorganised notes, code, and writings of random topics

Cracking the Code to a Successful Interview

Evan Pellett / 2016

January 5, 2018 book

Interviewer (hiring manager) have unconscious questions to be answered by each candidate Unconscious questions: achievement, process, creativity, relationships, aggressiveness, likeability Managers aren’t even aware of asking the unconscious questions [more]

Kraska et al (2017) The Case for Learned Index Structure (arXiv)

January 3, 2018 paper

This paper (PDF) investigates the use of neural network in deriving index structures (learned indexes), in the direction to replace B-tree, hash map, or Bloom filters. The paper claims that the index derived from neural network can outperform B-tree index in both speed and space. [more]

說話的力量 (TED Talks: The official TED guide to public speaking)

Chris Anderson 李芳齡譯 / 2016

December 23, 2017 book

人們喜愛聽故事。一個重要思想，用一個新故事再包裝後，以適當方式講述，就能形成一場精采的演講。演講人和聽眾的語言必須共通，語言才能發揮神奇力量。 [ch2] [more]

The Minto Pyramid Principle

Barbara Minto / 2014

December 20, 2017 book

The clearest sequence to write is “top-down”, i.e., give summarizing idea before the individual ideas being summarized. This approach require the reader to comprehend with least mental effort. [more]

Draw Koch snowflake with tkinter

December 20, 2017 blog code

Koch snowflake is probably the simplest fractal graphic. The fractal idea is to draw a straight line segment, , and make the trisection points and . Then replace the segment with a equilateral triangle, like the image below. [more]