Function selectCollapsedFrom

  • selectCollapsedFrom<Full extends AnyObject, const Selection extends any>(
        originalObject: Readonly<Full>,
        selectionSet: Readonly<Selection>,
    ): KeyCount<
        ExcludeEmpty<
            NonNullable<
                Full extends readonly Element[]
                    ? (
                        | Exclude<Element, AnyObject>
                        | (
                            Extract<Element, AnyObject> extends readonly Element[]
                                ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                                : MakeKeysOptional<
                                    Extract<Element, AnyObject>,
                                    {
                                        -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                            ? (...)
                                            : (...)]: any
                                    },
                                >
                        )
                    )[]
                    : MakeKeysOptional<
                        Full,
                        {
                            -readonly [Key in string
                            | number
                            | symbol as Selection[Key] extends false ? never : any]: any
                        },
                    >,
            >,
        >,
    > extends 1
        ? Selection[keyof (
            Full extends readonly Element[]
                ? (
                    | Exclude<Element, AnyObject>
                    | (
                        Extract<Element, AnyObject> extends readonly Element[]
                            ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                            : MakeKeysOptional<
                                Extract<Element, AnyObject>,
                                {
                                    -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                        ? (...)
                                        : (...)]: any
                                },
                            >
                    )
                )[]
                : MakeKeysOptional<
                    Full,
                    {
                        -readonly [Key in string
                        | number
                        | symbol as Selection[Key] extends false ? never : any]: any
                    },
                >
        )] extends GenericSelectionSet
            ? | (
                KeyCount<
                    ExcludeEmpty<
                        NonNullable<
                            NonNullable<Full[keyof (...)]> extends readonly Element[]
                                ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                                : MakeKeysOptional<
                                    NonNullable<(...)[(...)]>,
                                    {
                                        -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                            ? (...)
                                            : (...)]: any
                                    },
                                >,
                        >,
                    >,
                > extends 1
                    ? any[any][keyof (
                        NonNullable<Full[keyof (...)]> extends readonly Element[]
                            ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                            : MakeKeysOptional<
                                NonNullable<(...)[(...)]>,
                                {
                                    -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                        ? (...)
                                        : (...)]: any
                                },
                            >
                    )] extends GenericSelectionSet
                        ? | (
                            KeyCount<
                                ExcludeEmpty<NonNullable<(...) extends (...) ? (...) : (...)>>,
                            > extends 1
                                ? any[any][keyof ((...) extends (...) ? (...) : (...))] extends GenericSelectionSet
                                    ?
                                        | (
                                            KeyCount<(...)> extends 1
                                                ? (...) extends (...) ? (...) : (...)
                                                : any
                                        )
                                        | Extract<(...)[(...)], (...) | (...)>
                                    : any
                                : any
                        )
                        | Extract<
                            NonNullable<Full[keyof (...)]>[keyof (
                                NonNullable<(...)> extends readonly (...)[]
                                    ? (...)[]
                                    : MakeKeysOptional<(...), (...)>
                            )],
                            undefined | null,
                        >
                        : any
                    : any
            )
            | Extract<
                Full[keyof (
                    Full extends readonly Element[]
                        ? (
                            | Exclude<Element, AnyObject>
                            | (
                                Extract<(...), (...)> extends readonly (...)[]
                                    ? (...)[]
                                    : MakeKeysOptional<(...), (...)>
                            )
                        )[]
                        : MakeKeysOptional<
                            Full,
                            {
                                -readonly [Key in string
                                | number
                                | symbol as (...)[(...)] extends false ? never : any]: any
                            },
                        >
                )],
                undefined
                | null,
            >
            : any
        : any

    The same as selectFrom except that the final output is collapsed until the first nested value that has more than 1 key or that is not an object.

    Type Parameters

    • Full extends AnyObject
    • const Selection extends any

    Parameters

    Returns KeyCount<
        ExcludeEmpty<
            NonNullable<
                Full extends readonly Element[]
                    ? (
                        | Exclude<Element, AnyObject>
                        | (
                            Extract<Element, AnyObject> extends readonly Element[]
                                ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                                : MakeKeysOptional<
                                    Extract<Element, AnyObject>,
                                    {
                                        -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                            ? (...)
                                            : (...)]: any
                                    },
                                >
                        )
                    )[]
                    : MakeKeysOptional<
                        Full,
                        {
                            -readonly [Key in string
                            | number
                            | symbol as Selection[Key] extends false ? never : any]: any
                        },
                    >,
            >,
        >,
    > extends 1
        ? Selection[keyof (
            Full extends readonly Element[]
                ? (
                    | Exclude<Element, AnyObject>
                    | (
                        Extract<Element, AnyObject> extends readonly Element[]
                            ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                            : MakeKeysOptional<
                                Extract<Element, AnyObject>,
                                {
                                    -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                        ? (...)
                                        : (...)]: any
                                },
                            >
                    )
                )[]
                : MakeKeysOptional<
                    Full,
                    {
                        -readonly [Key in string
                        | number
                        | symbol as Selection[Key] extends false ? never : any]: any
                    },
                >
        )] extends GenericSelectionSet
            ? | (
                KeyCount<
                    ExcludeEmpty<
                        NonNullable<
                            NonNullable<Full[keyof (...)]> extends readonly Element[]
                                ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                                : MakeKeysOptional<
                                    NonNullable<(...)[(...)]>,
                                    {
                                        -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                            ? (...)
                                            : (...)]: any
                                    },
                                >,
                        >,
                    >,
                > extends 1
                    ? any[any][keyof (
                        NonNullable<Full[keyof (...)]> extends readonly Element[]
                            ? (Exclude<(...), (...)> | ((...) extends (...) ? (...) : (...)))[]
                            : MakeKeysOptional<
                                NonNullable<(...)[(...)]>,
                                {
                                    -readonly [Key in (...) | (...) | (...) as (...) extends (...)
                                        ? (...)
                                        : (...)]: any
                                },
                            >
                    )] extends GenericSelectionSet
                        ? | (
                            KeyCount<
                                ExcludeEmpty<NonNullable<(...) extends (...) ? (...) : (...)>>,
                            > extends 1
                                ? any[any][keyof ((...) extends (...) ? (...) : (...))] extends GenericSelectionSet
                                    ?
                                        | (
                                            KeyCount<(...)> extends 1
                                                ? (...) extends (...) ? (...) : (...)
                                                : any
                                        )
                                        | Extract<(...)[(...)], (...) | (...)>
                                    : any
                                : any
                        )
                        | Extract<
                            NonNullable<Full[keyof (...)]>[keyof (
                                NonNullable<(...)> extends readonly (...)[]
                                    ? (...)[]
                                    : MakeKeysOptional<(...), (...)>
                            )],
                            undefined | null,
                        >
                        : any
                    : any
            )
            | Extract<
                Full[keyof (
                    Full extends readonly Element[]
                        ? (
                            | Exclude<Element, AnyObject>
                            | (
                                Extract<(...), (...)> extends readonly (...)[]
                                    ? (...)[]
                                    : MakeKeysOptional<(...), (...)>
                            )
                        )[]
                        : MakeKeysOptional<
                            Full,
                            {
                                -readonly [Key in string
                                | number
                                | symbol as (...)[(...)] extends false ? never : any]: any
                            },
                        >
                )],
                undefined
                | null,
            >
            : any
        : any

    Example

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

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

    Package

    @augment-vir/common

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