@rkenmi - Search Results

Math Formulas for C.S.

Sum of the first $n$ integers $1 + 2 + 3 + ... + n = $ $$\sum_{k=1}^n k = \frac{1}{2}n(n+1)$$ Use cases: Finding a missing number from $1 ... n$ Sum of the squares of the first $n$ integers \(1^2 + 2^2 + 3^2 + .

May 27, 2019

Quick Numbers in Software Engineering Cheatsheet

Preface This article is a cheatsheet and a collection of tips/tricks for doing back of the envelope calculations. Numbers Data Types to Bytes Note: keep in mind that these are general estimates.

January 23, 2021

Design Concepts

... per second), coming up with a ballpark number of requests per month and using a little bit of math would be a good starting approach. Storage Storage is really going to depend on your service/application.

November 20, 2019

Machine Learning Basics

... are fitted with training data. Fitting is synonymous with learning, but it is a more mathematical term used to represent fitting values $m$ and $b$ inside a hypothetical model that can be generally represented as the function $y = mx + b$.

January 5, 2020

Misconceptions of Software Engineer interviews at FAANG

There are already so many articles and Quora/Reddit/Blind posts out there on how to interview prep to get into big companies. So instead of covering that in detail, I want to focus more on the angle of common misconceptions.

August 15, 2020

NumPy vs. Pandas, and other flavors (Dask, Modin, Ray)

... that offers multi-dimensional arrays and indices as data structures and additional high-level math utilities. ndarray The unique offering of NumPy is the ndarray data structure, which stands for n-dimensional array.

May 26, 2022