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Author Archives: lysender
It’s been a very long time
What’s up? Its been a very long time since I’ve posted something in my blog. I’m been very busy with my current job at a startup and it has gotten a good kick start. I’m also busy with trading equities … Continue reading
Posted in Personal Blog, Trading, Web Development
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Jest tests failing on CircleCI – ENOMEM: not enough memory
Out NestJS tests are intermittently failing with “not enough memory” error being thrown. There is nothing really special about the tests except for the fact that it is growing as the project grows. It turns out a simple CLI parameter … Continue reading
TIL – Jest expect to throw error in an async call
I just wanted to test that a certain async call should throw an error and I tried it on Jest. I’m already familiar with RSpec which has similar syntax. Below is what I did. The exec method is an async … Continue reading
MongoDB ReplicaSet on Docker Environment
I was playing around with MongoDB ReplicaSet yesterday in a Docker environment. The purpose is to test the integration with a backend service that connects to MongoDB. It was a very frustrating process especially when done in a local environment … Continue reading
Docker Compose Environment Variable and Quotes
TLDR: Do not put any double quotes or single quotes into the environment parameter in the docker-compose.yml file. Do we really need the long version of the story? Instead of this: Use this instead: Now this is odd as I … Continue reading
React Native + Expo + Redux – _react.default.memo is not a function
As of early June 2019 using the latest version of Expo, I’m not able to use Redux as I’m getting this error memo is not a function when trying to use connect. Spoiler, it is because Expo is using a … Continue reading
Using Base64 encode/decode in a React Native/Expo app
I can’t believe that I can’t easily encode and decode Base64 string in React Native without pulling my hair. I’m using Expo to manage my development workflow and it even adds more confusion. Thankfully, a little trick saves me from … Continue reading
First Metro Securities Change Password Issue
When I tried to login to First Metro Securities today, it says that my password already expired and won’t let me log in. I think I went to the classic version and tried to login too but when I changed … Continue reading
React/Expo Uses the Incorrect IP Address in Windows 10
My setup is in a Windows 10 machine with VirtualBox installed with a Host Only Network added by VirtualBox. Every time I run expo start it always picks up the VirtualBox network adapter instead of my machine’s Ethernet adapter. Without … Continue reading
TypeScript – URLSearchParams iterator typing issue
In a certain React course in Udemy, I encountered an issue on React and Typescript where an iterator does not work the way it is shown in the course and this is probably because the course is not written in … Continue reading
Posted in React, TypeScript
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