[Solved] Given this code, what will be logged?import { of } from 'rxjs'; import { map } from 'rxjs/operators'; of(1, 2, 3).pipe( map(x => x + 1) ).subscribe(console.log); | Angular

Angular - RxJS Operators

Given this code, what will be logged?

import { of } from 'rxjs';
import { map } from 'rxjs/operators';

of(1, 2, 3).pipe(
  map(x => x + 1)
).subscribe(console.log);

A1 2 3

B2 3 4

C[2, 3, 4]

DError: map is not a function

Step-by-Step Solution

Solution:

Step 1: Understand the source observable
of(1, 2, 3) emits values 1, then 2, then 3 sequentially.
Step 2: Apply the map transformation
The map adds 1 to each value, so outputs are 2, 3, and 4.
Final Answer:
2 3 4 -> Option B
Quick Check:
Input + 1 = Output [OK]

Quick Trick: map changes each value, so 1 becomes 2, etc. [OK]

Common Mistakes:

MISTAKES

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Given this code, what will be logged?