Reputation: 17773
var A = {
demo : function() * {
/* Some logic here, but no yield is used */
}
}
What is the use of a generator
method that does not yield
anything?
Have you ever used something like this? What was the use case?
Upvotes: 7
Views: 3417
Reputation: 10910
The following code prints 'someValue' on the response every 100 ms for 5 seconds. It does not use yield
.
const Koa = require('koa');
const through = require('through');
(new Koa()).use(function *(){
const tr = through();
setInterval(() => tr.write('someValue\n'), 100);
setTimeout(tr.end, 5000);
this.body = tr;
}).listen(3003, () => {});
Access with: curl localhost:3003
Upvotes: 0
Reputation: 665584
It's quite the same case like an empty function - someone wants to call a function, but you have nothing to do.
Similarly, an empty generator function is a function which creates a generator that does nothing. It does represent the empty sequence. However, a generator function that doesn't yield
isn't necessarily empty - it can still do something and have a result value, but there simply are no intermediate results.
Upvotes: 5