Custom Iteration Logic with Generators

Snippet

Custom Iteration Logic with Generators

Generators are functions that can be exited and later re-entered. Their context (variable bindings) will be saved across re-entrances. Using the '*' syntax and the 'yield' keyword, you can produce a sequence of values on demand, which is memory efficient for large datasets or custom sequences.

snippet.js
javascript
function* rangeGenerator(start, end, step = 1) {
  let current = start;
  while (current <= end) {
    yield current;
    current += step;
  }
}
 
for (const num of rangeGenerator(0, 10, 2)) {
  console.log(num); // 0, 2, 4, 6, 8, 10
}

Breakdown

function* rangeGenerator(...)

The asterisk denotes a generator function which returns an Iterator object.

yield current;

Pauses generator execution and returns the current value to the caller.

for (const num of rangeGenerator(...))

Uses the built-in iterator protocol to consume values produced by the generator.

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Custom Iteration Logic with Generators

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