Oskari Porkka
@oporkka.bsky.social
I am a software developer, musician, father & partner, Finn in Berlin.
Reposted by Oskari Porkka
TIL: Branded types in TypeScript
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...
![Preventing forging
When you use a regular property like __brand, it doesn't prevent someone from forging values:
import {usdToEur} from "./currency.ts";
type Greenbux = number & { __brand: "USD" };
usdToEur(50 as Greenbux);
To protect against this, you can use a Symbol for the property:
const brand = Symbol();
type Currency<T> = number & { [brand]: T };
type USD = Currency<"USD">;
If you do it this way, it's no longer purely in the types — your generated JS code will have a const brand = Symbol() (though it's never used).
To eliminate that, you can use declare const with unique symbol:
declare const brand: unique symbol;
type Currency<T> = number & { [brand]: T };
type USD = Currency<"USD">;
AFAIK, this is equivalent to the previous example, but it's a type-only declaration.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:zcycfvljdjkc2ywtj33blgdl/bafkreihrzinnaa4xfcrvgdfd65ikcpc76m4jcfiiafbtxibcarnmr7gzci@jpeg)
November 19, 2025 at 7:40 PM
TIL: Branded types in TypeScript
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...
Reposted by Oskari Porkka
TANK vs TESLA
"We've crushed fascism before and we'll crush it again"
- WW2 veteran Ken, 98, in the tank
"We've crushed fascism before and we'll crush it again"
- WW2 veteran Ken, 98, in the tank
May 7, 2025 at 4:46 PM
TANK vs TESLA
"We've crushed fascism before and we'll crush it again"
- WW2 veteran Ken, 98, in the tank
"We've crushed fascism before and we'll crush it again"
- WW2 veteran Ken, 98, in the tank
One of those days when perhaps the most ingenious piece of engineering I accomplished was figuring out how to load the dishwasher in an optimal way.
February 10, 2025 at 6:49 PM
One of those days when perhaps the most ingenious piece of engineering I accomplished was figuring out how to load the dishwasher in an optimal way.
Reposted by Oskari Porkka
At your company, is your key issue collaborating on things that could be transactional, or trying to treat collaborative things transactionally? Or somewhere in between?
January 18, 2025 at 6:12 PM
At your company, is your key issue collaborating on things that could be transactional, or trying to treat collaborative things transactionally? Or somewhere in between?
Reposted by Oskari Porkka
A valuable training I took at Microsoft when I became a senior manager introduced me to managing your energy.
Early in your career, time management is a critical skill. However as you get more senior there is eventually more work than you can ever fit into the time.
Early in your career, time management is a critical skill. However as you get more senior there is eventually more work than you can ever fit into the time.
January 12, 2025 at 4:55 PM
A valuable training I took at Microsoft when I became a senior manager introduced me to managing your energy.
Early in your career, time management is a critical skill. However as you get more senior there is eventually more work than you can ever fit into the time.
Early in your career, time management is a critical skill. However as you get more senior there is eventually more work than you can ever fit into the time.
“Ideal time” to have the old refrigerator freezer combo finally go out of order: It’s around 0 degrees C outside for the next 48 hours, and the food can be stored on the balcony.
January 4, 2025 at 11:48 AM
“Ideal time” to have the old refrigerator freezer combo finally go out of order: It’s around 0 degrees C outside for the next 48 hours, and the food can be stored on the balcony.
Reposted by Oskari Porkka
Picard management tip: Show crew members how impressed you are with their accomplishments. Validation matters.
December 19, 2024 at 8:40 PM
Picard management tip: Show crew members how impressed you are with their accomplishments. Validation matters.
It must have been 15-20 years since I last time played Sid Meier’s original Colonization, but I still have an occasional ear worm from one of the songs in it youtu.be/iiLB55AJUMo
Choicest VGM - VGM #243 - Sid Meier's Colonization - To Arms
YouTube video by Choicest Games
youtu.be
December 19, 2024 at 2:20 PM
It must have been 15-20 years since I last time played Sid Meier’s original Colonization, but I still have an occasional ear worm from one of the songs in it youtu.be/iiLB55AJUMo
Extremely productive
December 5, 2024 at 4:18 PM
Extremely productive