Marvin Irwin – Medium

Marvin Irwin

Gi BJJ: The basics

I don’t like classes too much, I’m going to try and collect things to use in every position.

2 min readFeb 14, 2023

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Marvin Irwin

Getting text from a pdf in the browser

Surprisingly difficult to find an example of this, but here it is

1 min readJan 12, 2023

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Marvin Irwin

Gas estimation and large strings in the Ethereum virtual machine feat. Remix and Klaytn

I’m trying to store, and compose strings on-chain, and would like to know almost exactly how much gas it costs, and whether or not I should…

4 min readJan 30, 2022

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Gas estimation and large strings in the Ethereum virtual machine feat. Remix and Klaytn

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Marvin Irwin

mysql-promise in Cypress plugin.js

Using Cypress with MySQL

1 min readMay 12, 2020

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mysql-promise in Cypress plugin.js

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Marvin Irwin

Getting started with Cypress and Cypress-recorder, quickly

I have a React app to test. The directory structure looks roughly like this.

2 min readMay 3, 2020

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Getting started with Cypress and Cypress-recorder, quickly

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Marvin Irwin

All the things you can’t do in IE11 javascript

Generated by running jq against https://github.com/mdn/browser-compat-data

1 min readMay 3, 2020

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All the things you can’t do in IE11 javascript

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Marvin Irwin

Pinyin with Javascript and Unicode

The 4 tones

2 min readApr 27, 2020

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Pinyin with Javascript and Unicode

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Marvin Irwin

snippet: execute shell command in javascript

1 min readMar 20, 2020

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snippet: execute shell command in javascript

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Marvin Irwin

Creating a communication channel between Node to Selenium

Here is how I abstract Node-Selenium Communication with no dependencies.

3 min readMar 17, 2020

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Creating a communication channel between Node to Selenium

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Marvin Irwin

Top 3 Javascript functions you’ve never heard of

__ffmpegjs_toU8

1 min readMar 16, 2020

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Top 3 Javascript functions you’ve never heard of

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Marvin Irwin

Marvin Irwin

React/Typescript/NodeJs/Blockchain Freelancer. 90CAD/hour. Happy to talk to you for for a few hours on some longshot proof of concept before staring work

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