Function selectFrom

Returns Full extends readonly Element[]
    ? (
        | Exclude<Element, AnyObject>
        | (
            Extract<Element, AnyObject> extends readonly Element[]
                ? (
                    | Exclude<Element, AnyObject>
                    | (
                        Extract<Element, AnyObject> extends readonly Element[]
                            ? (
                                | Exclude<Element, AnyObject>
                                | (
                                    Extract<(...), (...)> extends readonly (...)[]
                                        ? (...)[]
                                        : MakeKeysOptional<(...), (...)>
                                )
                            )[]
                            : MakeKeysOptional<
                                Extract<Element, AnyObject>,
                                {
                                    -readonly [Key in string | number | symbol as (...)[(...)] extends false
                                        ? never
                                        : (...) extends (...) ? (...) : (...)]:
                                        | ((...) extends (...) ? (...) : (...))
                                        | Exclude<(...), (...)>
                                },
                            >
                    )
                )[]
                : MakeKeysOptional<
                    Extract<Element, AnyObject>,
                    {
                        -readonly [Key in string | number | symbol as Selection[Key] extends false
                            ? never
                            : Key extends keyof Extract<Element, AnyObject> ? Key<Key> : never]:
                            | (
                                Selection[Key] extends GenericSelectionSet
                                    ? NonNullable<Extract<(...), (...)>> extends readonly Element[]
                                        ? ((...) | (...))[]
                                        : MakeKeysOptional<
                                            NonNullable<(...)>,
                                            { -readonly [Key in (...) as (...)]: (...) },
                                        >
                                    : Extract<Element, AnyObject>[Key]
                            )
                            | Exclude<Extract<Element, AnyObject>[Key], AnyObject>
                    },
                >
        )
    )[]
    : MakeKeysOptional<
        Full,
        {
            -readonly [Key in string
            | number
            | symbol as Selection[Key] extends false
                ? never
                : Key extends keyof Full ? Key<Key> : never]:
                | (
                    Selection[Key] extends GenericSelectionSet
                        ? NonNullable<Extract<Full[Key], AnyObject>> extends readonly Element[]
                            ? (
                                | Exclude<Element, AnyObject>
                                | (
                                    Extract<Element, AnyObject> extends readonly Element[]
                                        ? ((...) | (...))[]
                                        : MakeKeysOptional<
                                            Extract<(...), (...)>,
                                            { -readonly [Key in (...) as (...)]: (...) },
                                        >
                                )
                            )[]
                            : MakeKeysOptional<
                                NonNullable<Extract<Full[Key], AnyObject>>,
                                {
                                    -readonly [Key in string | number | symbol as any[any][Key] extends false
                                        ? never
                                        : Key extends keyof (...) ? Key<(...)> : never]:
                                        | (
                                            (...)[(...)] extends GenericSelectionSet
                                                ? (...) extends (...) ? (...) : (...)
                                                : (...)[(...)]
                                        )
                                        | Exclude<(...)[(...)], AnyObject>
                                },
                            >
                        : Full[Key]
                )
                | Exclude<Full[Key], AnyObject>
        },
    >

import {selectFrom} from '@augment-vir/common';

selectFrom(
    [
        {
            child: {
                grandChild: 'hi',
                grandChild2: 3,
                grandChild3: /something/,
            },
        },
        {
            child: {
                grandChild: 'hi',
                grandChild2: 4,
                grandChild3: /something/,
            },
        },
    ],
    {
        child: {
            grandChild2: true,
        },
    },
);
// output is `[{child: {grandChild2: 3}}, {child: {grandChild2: 4}}]`
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