What are the different kinds of generators?
Interviewer Expectations for this Question
01
Core Competency
Assesses fundamental understanding of JavaScript conventions, runtime behavior, and memory/performance considerations.
02
Evaluation Criteria
Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.
Comprehensive Model Answer
Verified Solution
There are five kinds of generators,
- Generator function declaration:
function* myGenFunc() {
yield 1;
yield 2;
yield 3;
}
const genObj = myGenFunc();
- Generator function expressions:
const myGenFunc = function* () {
yield 1;
yield 2;
yield 3;
};
const genObj = myGenFunc();
- Generator method definitions in object literals:
const myObj = {
*myGeneratorMethod() {
yield 1;
yield 2;
yield 3;
},
};
const genObj = myObj.myGeneratorMethod();
- Generator method definitions in class:
class MyClass {
*myGeneratorMethod() {
yield 1;
yield 2;
yield 3;
}
}
const myObject = new MyClass();
const genObj = myObject.myGeneratorMethod();
- Generator as a computed property:
const SomeObj = {
*[Symbol.iterator]() {
yield 1;
yield 2;
yield 3;
},
};
console.log(Array.from(SomeObj)); // [ 1, 2, 3 ]
Candidate Response Strategy & Interview Tips
- Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
- Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
- Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
- Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.