Paid assistance

[lone otter]

we don't do paid help here

i don't think you need overloads for this since you have all those defaults

or maybe you do, let's see

yeah probably to prevent some other issues

[lone otter]

i don't think you can really make this typesafe actually

at least in the implementation

[river stratus]

that_guy977#0

Playground Link

Preview:ts ... function array2Tree<Id extends string | number, T extends Record<'id', Id> & Record<'pid', Id>>(data: T[]): T; function array2Tree<Id extends string | number, T extends Record<KId, Id> & Record<'pid', Id>, const KId extends string>(data: T[], idField: KId): T; function array2Tree<Id extends string | number, T extends Record<KId, Id> & Record<KPId, Id>, const KId extends string, const KPId extends string>(data: T[], idField: KId, parentIdField: KPId): T; function array2Tree<Id extends string | number, T extends Record<KId, Id> & Record<KPId, Id>, const KId extends string, const KPId extends string, const KChildren extends string>(data: T[], idField: KId, parentIdField: KPId, childrenField: KChildren): T; ...

[lone otter]

managed to get this but the inference doesn't work so well

[minor swan]

Thanks much, but there may be a deviation in my description. Using function overloading is just one of the means, and it is also possible to avoid using function overloading. Sorry again about the payment, because this problem has been bothering me, I just hope to find a better solution as soon as possible