Jiayee.net

My learning diary

Reach Router Match

#react #reach
I use Reach Router. I’ve a component which isn’t a child of Router, so it does not have the useLocation hook. But I need to access the current URL in that component. Here’s how I did it after seeing Jacek’s hint: <div> <Match path="/*"> {(props) => ( <MyComponent path="/*" match={props.match ?? ''} /> )} </Match> <Router> ... </Router> </div> interface Props { match: any; } export const MyComponent: FC<Props> = (props: Props) => { const pathname = props.

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Numerical IDs in MongoDB

#spring #mongo
Auto-generated IDs in MongoDB are “strange” strings. I quote “strange” because they are actually derived not out of nowhere despite looking like they had nothing to do with anything. But to users, these IDs are strange. I had a collection of documents with a name property. Originally, name was annotated with @Id. But it meant that I couldn’t change the value of name. name was also annotated with regex validation (@Pattern(.

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Abstract classes and AOP

#java
I wanted to avoid writing boilerplate code for CRUD in Spring Boot. But I failed - I couldn’t make my child aspect get along with my child controller. Before adopting AOP, I had an abstract controller which the child controller inherited. CRUD worked well and I no longer needed to repeat the code for simple CRUD anymore. I was happy. // MyAbstractController public abstract class MyAbstractController<T extends UniversalModel> { private final .

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Super Thinking Chapter 01

#braindump #eq
Being Wrong Less Inverse thinking. Instead of thinking how you can save money, think about how you can reduce your expenses. Unforced error. A personal shortcoming which can be controlled. Anti-fragile. Treating setbacks as challenges and thriving on them. Keep it simple, stupid! Arguing from first principles. De-risking. Challenging assumptions and verifying or debunking them. Premature optimisation. Minimum viable product. Ockham’s razor. “The simplest explanation is usually the right one.” Conjunction fallacy.

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Sticky

#css
I found myself entangled in CSS. I needed app-header to stick to the top at all times. I also needed template-header to be right beneath app-header at all times. Lastly, embedded-content should begin immediately after template-header and shouldn’t be sticky. Here’s how the page organisation might look like: <div class="app"> <div class="app-header"> <!-- Content --> </div> <div class="app-content"> <div class="template-container"> <div class="template-header"> <!-- Content --> </div> <div class="embedded-content"> <!-- Content --> </div> </div> </div> </div> The simplest approach is to place app-header and template-header inside a single div.

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