isObjectSomeKeys()

isObjectSomeKeys()

Checks if any value is an object(by using the isObject()) with some of its keys or some groups of its keys of the PropertyKey type.

The two-dimensional Array of the given value is an Array of Arrays where the relation between elements of the first Array is a logical OR, and the relationship between elements of the second Array is a logical AND.

The logical OR results from the use of the some() method of the Array, and a logical AND result from every().

is-object-some-keys.func.ts

const isObjectSomeKeys = <
  Obj extends object,
  Payload extends object = object
>(
  value: any,
  keys: (PropertyKey | PropertyKey[])[],
  callback: ResultCallback<
    any,
    { keys: typeof keys } & Payload
  > = resultCallback,
  payload?: Payload
): value is Obj =>
  callback(
    isObject(value) && isArray(keys)
      ? keys.some((someKey) =>
          isArray(someKey)
            ? someKey.every((everyKey) =>
                ({}.hasOwnProperty.call(value, everyKey))
              )
            : {}.hasOwnProperty.call(value, someKey) === true
        )
      : false,
    value,
    { ...payload, keys } as any
  );

type/is-object-some-keys.func.ts at main · angular-package/typeGitHub

Generic type variables

Objextendsobject

A generic type variable Obj constrained by the object indicates the type of the given value parameter via the return type value is Obj, by default object.

Payloadextendsobject=object

The Payload generic type variable constrained by object indicates the type of optional parameter payload of the supplied callback function and payload optional parameter of the isObjectSomeKeys() function from which it captures its value.

Parameters

value: any

The value of any type to check against an object that contains some of its keys or some groups of its keys from a given keys.

keys: (PropertyKey | PropertyKey[])[]

An Array of property names or a two-dimensional array of property names to check if the given value contains some of them or some groups of them.

callback: ResultCallback<any, { keys: typeof keys } & Payload>

A callback function of ResultCallback type with parameters, the value that has been checked, the result of this check, and payload of generic type variable Payload with optional properties from the provided payload, to handle them before the result return. By default, it uses resultCallback() function.

The payload parameter of the callback function consists of the keys property given in parameter of the core function, and it can't be overwritten by the given payload parameter of the core function.

payload?: Payload

An optional object of the generic type variable Payload is assigned to the payload of the given callback function.

Return type

value is Obj

The return type is a boolean as the result of its statement indicating the value is a generic type variable Obj by default equal to the object.

Returns

The return value is a boolean indicating whether the provided value is an object with some of its keys or some groups of its keys from a given keys.

Example usage

// Example usage.
import { isObjectSomeKeys } from '@angular-package/type';

class Person {
  firstName = 'name';
  surname = 'surname';
  age = 27;
  city = 'New York';
  sex = 'Male';
  get getAge(): number {
    return this.age;
  }
}
const person = new Person();
// Define property.
Object.defineProperty(person, 'notEnumerable', { enumerable: false });
person.propertyIsEnumerable('notEnumerable'); // Returns `false`.
isObjectSomeKeys(person, ['firstName']); // Returns `true` as `value is object`.
isObjectSomeKeys(person, ['firstName', 'surname']); // Returns `true` as `value is object`.
isObjectSomeKeys(person, ['firstName', 'no property']); // Returns `true` as `value is object`.
// Getter.
isObjectSomeKeys(person, ['getAge']); // Returns `false` as `value is object`.
// not enumerable.
isObjectSomeKeys(person, ['notEnumerable']); // Returns `true` as `value is object`.
isObjectSomeKeys(person, [['firstName', 'surname'], ['city', 'age']]); // Returns `true` as `value is object`.
isObjectSomeKeys(person, [['firstName', 'surname'], ['city', 'no property']]); // Returns `true` as `value is object`.
isObjectSomeKeys(person, [['firstName1', 'surname1'], ['city1', 'no property']]); // Returns `false` as `value is object`.