#Haxe still has a better type system than #Typescript, soz. - TypeScript

ohmrun, 13 days ago

#Haxe still has a better type system than #Typescript, soz.

$/** * Get the image when it's loaded */ function run(){ //Return an arrow using the input //use the input to generate an arrow dependent on the img state, and the run it const arrow = F.FlatMap( (img:HTMLImageElement) => { if (img.complete){ //image is already loaded let res : Arrowlet<HTMLImageElement,E.Either<AppError,HTMLImageElement>> = F.Pure(E.right(img)); return res; }else{ //the Event arrowlet adds an event handler, waits for the event and then cleans up the handler. // If it's not called, the scheduler takes care of it as a work item after const l : Arrowlet<HTMLImageElement,E.Either<AppError,HTMLImageElement>> = F.Map(F.Event('onload'),(_) => E.right(img)); const r : Arrowlet<HTMLImageElement,E.Either<AppError,HTMLImageElement>> = F.Map(F.Event('onerror'),(_) => E.left(new LoadError())); return (F.Map(F.RaceWithTimeout( l,r, 2000, new TimeoutError() ),(r:E.Either<TimeoutError, E.Either<AppError, HTMLImageElement>>): E.Either<AppError,HTMLImageElement> => { return E.fold( (l:TimeoutError) => E.left(l), (r:E.Either<AppError,HTMLImageElement>) => r )(r) })); } } ).apply(F.Unit() as Arrowlet<HTMLImageElement,HTMLImageElement>) }$

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tanepiper, 12 days ago

@ohmrun I loved working with Haxe back in the day - it's a shame it never quite took off the same way

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