<script>
function getSomething() {
var r = 0;
setTimeout(function() {
r = 2;
}, 10);
return r;
}
function compute() {
var x = getSomething();
alert(x * 2);
}
compute();
</script>
<script>
function getSomething(cb) {
var r = 0;
setTimeout(function() {
r = 2;
cb(r);
}, 10);
}
function compute(x) {
alert(x * 2);
}
getSomething(compute);
</script>
<script>
function getSomething() {
var r = 0;
return new Promise(function(resolve) {
setTimeout(function() {
r = 2;
resolve(r);
}, 10);
});
}
function compute(x) {
alert(x * 2);
}
getSomething().then(compute);
</script>
<script>
function getSomething() {
var r = 0;
setTimeout(function() {
r = 2;
it.next(r);
}, 10);
}
function *compute(it) {
var x = yield getSomething();
alert(x * 2);
}
var it = compute();
it.next();
</script>
<script>
function getSomething() {
var r = 0;
return new Promise(function(resolve) {
setTimeout(function() {
r = 2;
resolve(r);
}, 10);
});
}
function *compute() {
var x = yield getSomething();
alert(x * 2);
}
var it = compute();
it.next().value.then(function(value) {
it.next(value);
});
</script>
<script>
function getSomething() {
var r = 0;
return new Promise(function(resolve) {
setTimeout(function() {
r = 2;
resolve(r);
}, 10);
});
}
async function compute() {
var x = await getSomething();
alert(x * 2);
}
compute();
</script>
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