 pairs function deprecated  
Convert an object into an Observable of [key, value] pairs. Deprecation Notes Use from(Object.entries(obj)) instead. Will be removed in v8. pairs(obj: any, scheduler?: SchedulerLike) Parameters     obj  any   The object to inspect and turn into an Observable sequence.     scheduler  SchedulerLike   Optional. Default is undefined.  An optional IScheduler to schedule when resulting Observable will emit values.     Description Turn entries of an object into a stream.  pairs takes an arbitrary object and returns an Observable that emits arrays. Each emitted array has exactly two elements - the first is a key from the object and the second is a value corresponding to that key. Keys are extracted from an object via Object.keys function, which means that they will be only enumerable keys that are present on an object directly - not ones inherited via prototype chain. By default, these arrays are emitted synchronously. To change that you can pass a SchedulerLike as a second argument to pairs. Example Converts an object to an Observable import { pairs } from 'rxjs';

const obj = {
  foo: 42,
  bar: 56,
  baz: 78
};

pairs(obj).subscribe({
  next: value => console.log(value),
  complete: () => console.log('Complete!')
});

// Logs:
// ['foo', 42]
// ['bar', 56]
// ['baz', 78]
// 'Complete!' Object.entries required In IE, you will need to polyfill Object.entries in order to use this. MDN has a polyfill here Overloads
pairs(arr: any, T, __2, scheduler?: SchedulerLike): Observable<[string, T]>
Parameters
    arr  any      T        __2        scheduler  SchedulerLike  Optional. Default is undefined.    
Returns
Observable<[string, T]>
pairs(obj: O, scheduler?: SchedulerLike): Observable<[keyof O, O[keyof O]]>
Parameters
    obj  O      scheduler  SchedulerLike  Optional. Default is undefined.    
Returns
Observable<[keyof O, O[keyof O]]>
pairs(iterable: Iterable<T>, scheduler?: SchedulerLike): Observable<[string, T]>
Parameters
    iterable  Iterable<T>      scheduler  SchedulerLike  Optional. Default is undefined.    
Returns
Observable<[string, T]>
pairs(n: number | bigint | boolean | symbol | ((...args: any[]) => any), scheduler?: SchedulerLike): Observable<[never, never]>
Parameters
    n  number | bigint | boolean | symbol | ((...args: any[]) => any)      scheduler  SchedulerLike  Optional. Default is undefined.    
Returns
Observable<[never, never]> 

    
{'path': 'public/docs/rxjs/api/index/function/pairs.html', 'source': 'DevDocs.IO'}