All files / src ts-prop.ts

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1x
1x
 
 
1x
2x
 
 
 
 
 
 
 
 
 
 
import {compareBy, DataClass} from "@lightningkite/khrysalis-runtime";
import {DataClassProperty} from "./DataClassProperty";
 
 
export function prop<K extends DataClass, KEY extends keyof K & string>(key: KEY): DataClassProperty<K, K[KEY]> {
    return new DataClassProperty(
        key,
        x => x[key],
        (a, b) => {
            const dict: Partial<K> = {}
            dict[key] = b
            return a.copy(dict)
        },
        compareBy(x => x[key])
    )
}