Pass a value to a generator
basics: get the values from a generator in two ways
function* generatorFunction() {
yield 1;
yield 2;
}
// way #1
var convertedToAnArray = Array.from(generatorFunction());
// way #2
var iterator = generatorFunction();
var iteratedOver = [iterator.next().___, iterator.___];
assert.deepEqual(iteratedOver, convertedToAnArray);
pass a value to the iterator
function* generatorFunction() {
yield 1;
yield param;
}
var iterator = generatorFunction();
var iteratedOver = [iterator.next().value, iterator.next(2).value];
assert.deepEqual(iteratedOver, [1, 2]);
a value passed to the 1st next() call is ignored
function* generatorFunction() {
yield 1;
}
let iterator = generatorFunction();
const values = [
iterator.next('irrelevant').value,
iterator.next(2).value
];
assert.deepEqual(values, [1, 2]);
Links
spec
The part in the spec, that describes how a generator resumes.