To make this a little more concrete, just for fun...
Suppose I make an object representing "all future clicks" and give it a
map() method. This much, of course, is possible already:
var clicks = {
map: function (f) {
document.addEventListener("click", f);
}
};
With Mike's proposal, you could write:
for (let e of clicks) {
alert(e.clientX + ", " + e.clientY);
}
This would desugar to:
clicks.map(e => {
alert(e.clientX + ", " + e.clientY);
});
And a listener would be attached to the document. The body of the loop
would run each time the user clicked.
Iterators don't do this.
-j
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
