trav

trav

@techsavvytravvy.com

sr software engineer @ crunchyroll 🦀🔪 @ crablang winning the fight against Big Outside™

4.8K followers832 following1.3K posts

trav
@techsavvytravvy.com

this weekend i'll be joining some friends to stream episode 1 of a brand new d&d campaign called Glow in the Dark - it's an original story created by my best friend and dm with fantasy, scifi, and anime/manga influences. come hang out sunday @ 4pm ET! twitch.tv/ptmhshow

trav
@techsavvytravvy.com

don't even need the deepEquals since the type will be narrowed by returning the FAIL symbol. so if it's not that, it should be our type

trav@techsavvytravvy.com

so one of things you can do in typescript is create type predicates that allow you to check if an input value is a specific type with return type `x is Foo`. unfortunately there is nothing that helps you make sure the predicate is accurate - as long as it returns a boolean it will pass

trav
@techsavvytravvy.com

so one of things you can do in typescript is create type predicates that allow you to check if an input value is a specific type with return type `x is Foo`. unfortunately there is nothing that helps you make sure the predicate is accurate - as long as it returns a boolean it will pass

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trav
@techsavvytravvy.com

the initial attempt is fine, but throwing then doing try/catch for each check isn't ideal and the predicate will be inferred for whatever type you return. instead i want the type param to be used explicitly and we'll return a symbol to indicate failure instead of throwing i think it's pretty nice!

trav
@techsavvytravvy.com

i will say, there are some downsides. deepEqual can obviously get expensive if you're comparing a lot of big objects, and there are some dumb things about narrowing that mean you can't return the input directly

trav
@techsavvytravvy.com

so one of things you can do in typescript is create type predicates that allow you to check if an input value is a specific type with return type `x is Foo`. unfortunately there is nothing that helps you make sure the predicate is accurate - as long as it returns a boolean it will pass

trav
@techsavvytravvy.com

so a couple weeks ago i accepted an offer from crunchyroll for the Senior Software Engineer position on the video team and i start monday! and damn this snuck up on me i am not mentally prepared

trav
@techsavvytravvy.com

really like this pattern where the type name is also the namespace name bc i don't have to do something like Result.Result that i see some others do with the `import * as Result` thing tree-shaking could be a concern tho idk