Quick notes

Quickie posts when I’m lazy

TIL: May 2024

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Monthly rubric about the curious things I have learnt / discovered

Golang stdlib can't unmarshal the whole JSON from the stream

I believe that stdlib should dictate the standards of high-quality, efficient software development. Generally, I don't expect much from Go, but recently I came across unmarshalling of a large JSON blob. Apparently, there is no way to deserialise from the stream – the only single method json.Unmarshal exists – it reads from a byte[]. Indeed, that would occupy about 2x the original size in memory for the structure, where less than the size of the JSON input could be used.

Obviously, there is a stream json.Decoder that allows processing of the input stream io.Reader, but it's essentially semi-manual processing.

No surprise at the very stereotypical answers from the Golang community: "you don't need it":
reddit response

Someone prohibited the use of JSON for that – tell your company that the project can't be implemented because a Golang developer shouldn't want to stream-parse the response efficiently.
don't use json, quit you job instead

Impersonate Web3 EVM wallet

That's a life-saver. Regardless of how comfy I feel about Foundry tools or ethers.js, nothing will replace proper user experience – especially while researching other accounts. impersonator.xyz allows spoofing of a wallet address via the WalletConnect protocol. Highly recommended for DeFi degens, analysts and builders.

TIL: Feb 2025

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Personal programming language complexity grading

I was reflecting about what language is easier to use for the production grade apps and MVP. Certainly, the real grading depend on the context, type and maturity of the service being developed and dozens of other factors. Not trying to simplify things - the table below is just a subjective estimate of the complexity of producing code in two radically different development workflows: AI-driven, and ruX(human)-driven.

Language Human-driven AI-driven
Kotlin 1 10
Typescript 3 1
Rust 10 5
Bash 20 1
JavaScript 40 2
Python 50 1

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TIL: Jun 2025

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Replit is great

Despite them being jerks about incorrectly issued invoices, the platform is just amazing. It's never been this easy for the average Joe to build something custom from scratch.

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TIL: Dec 2024

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Setting up Transparent TCP Proxifier (aka VPN) in Linux Can't Be Easier

Just wow, you never stop learning about Linux. You can wrap all TCP traffic transparently via an SSH channel just like that:

  1. Install proxychains-ng (alternatives include torsocks or tsocks).
  2. Set up a background persistent connection to the jump box: 
    ssh -D 1080 -N -f -o ServerAliveInterval=30 user@jump.box
  3. Create a proxychains configuration file in ~/.proxychains/proxychains.conf: 
    strict_chain
proxy_dns
tcp_read_time_out 15000
tcp_connect_time_out 8000
[ProxyList]
socks5 127.0.0.1 1080

Done. Seriously.

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TIL: Oct 2024

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Classy Ubuntu's snap

Snaps were invented to break down the system and annoy users make software easy to upgrade, mitigate dependency hell, and add some sort of placebo security layer.

github comment explaining that snap isn't supported

This comment in the geth repo highlights one of the reasons why I hate Ubuntu Snap and why I switched from Ubuntu to Pop!OS and never looked back. Unfortunately, I'm still using Ubuntu at work, and these Snap issues persist, though to a lesser degree.

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TIL: Apr 2024

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I'm starting a new regular monthly postly theme - TIL ${MONTH}. Although I've mostly disappeared from the social networks I still have a strong urge to share some curous discovery throughout the month.

Google Workspace admin can restore data removed by user

Google Workspace admin can restore data removed by user

It was switched on by default, I guess it won't be very suprising that admin has these level of intervention but still, huh.

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Wrapping Up 2023

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It's been a long time since I shared something from my personal life, and generally, not much has been written on the blog in the last few years. Changes in lifestyle, health, and priorities have had a significant impact on how I process things and what I want to share.

Health

The health state is worrying me more than before, which is gradually worsening.

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DeFi: your tokens aren’t in your wallet

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Crypto and in particular DeFi can be technically very complex, and the general audience often might oversee the importance of understanding the technical implementation.

In colloquial language, people often say something like "I've got 10 USDT in my wallet" or "my wallet has 1M Shibu Dogs". It sounds normal and assuring; we all have experience of having money in our pocket. As usual, it's not that simple after looking into the details.

Without the fundamental understanding of where tokens are actually stored there is increasing risk of losing money. It's a DeFi 101.

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