在下面的代码(从Javascript并发截取)困惑,应该有iterable = genMap(iterable, iteratee)
循环换的经过三次发生器对象。但是,yield* iterable
是一个单一的参考。它如何yield
三组数值从genMap
?谢谢。由发电机
function* genMap(iterable, iteratee) {
for (let item of iterable) {
console.log('item', item)
yield iteratee(item);
}
}
function composeGenMap(...iteratees) {
return function* (iterable) {
for (let iteratee of iteratees) {
iterable = genMap(iterable, iteratee);
}
yield* iterable;
}
}
// Our iterable data source.
var array = [ 1, 2, 3 ];
var composed = composeGenMap(
x => x + 1,
x => x * x,
x => x - 2
);
for (let item of composed(array)) {
console.log('composed', item)
}
// →
// composed 2
// composed 7
// composed 14
'产量*'推迟执行到另一发电机。 – gyre