Category Archives: SoftwareEngineering

Software Engineering

Operations notes

Posted on April 12, 2023 by rendon

Compare two files and get only the difference Source: https://stackoverflow.com/questions/4544709.

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Rust resources

Posted on August 27, 2022 by rendon

Rust for beginners (from Microsoft)

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Programming notes

Posted on August 24, 2022 by rendon

General concepts Ruby

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Exclude directories in IntelliJ’s Find in Files

Posted on July 13, 2022 by rendon

So, I’m working on a small project. Once in a while I open Find in Files to look something up, but I notice that the search is a bit slow even though I only have a few files. I’m aware … Continue reading →

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C++: Unordered maps and sets for non-primitive types

Posted on June 11, 2022 by rendon

Since C++ 11, we can use unordered sets and unordered maps. However, these data structures only seem to work with primitive types and strings. If you need a pair or a vector as the key, you’re out of luck. Fortunately, … Continue reading →

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QuickSelect

Posted on June 11, 2022 by rendon

Theory Quickselect on Wikipedia Implementation in C++ Practice https://leetcode.com/problems/kth-largest-element-in-an-array/

Posted in Algorithms & Data structures, Posts, SoftwareEngineering | 14 Comments

Fenwick tree (aka Binary Indexed Tree)

Posted on May 30, 2022 by rendon

Theory TopCoder – Binary Indexed Trees Algorithms Live – Fenwick tree Wikipedia – Fenwick tree Implementation in C++ Practice Kattis – Movie collection AtCoder – B Fenwick Tree

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Disjoint Set Union (aka Union-Find)

Posted on May 30, 2022 by rendon

Theory Algorithms, 4th edition by Robert Sedgewick, Kevin Wayne 1.5   Case Study: Union-Find Union Find on Cubits.ai Implementation in C++ Practice https://atcoder.jp/contests/practice2/tasks/practice2_a

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Must read

Posted on May 8, 2022 by rendon

Retries Exponential Backoff And Jitter AWS SDK Retry behavior Error retries and exponential backoff in AWS Example in Java The following example is not meant to be complete, its goal is to give you a good idea of how to … Continue reading →

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Generate files with random bytes

Posted on March 25, 2022 by rendon

The following command grabs 20 Mb of random bytes from /dev/urandom and saves it to rnd.bin: Generate a bunch of files:

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