1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// |reftest| async
// Copyright (C) 2023 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.fromasync
description: >
A synchronous mapping function is applied to each (awaited) item of an
arraylike.
info: |
3.k.vii.4. If _mapping_ is *true*, then
a. Let _mappedValue_ be ? Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
...
...
6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
flags: [async]
includes: [asyncHelpers.js, compareArray.js]
features: [Array.fromAsync]
---*/
const arrayLike = {
length: 4,
0: 0,
1: 2,
2: Promise.resolve(4),
3: 6,
};
function syncMap(val, ix) {
return val * ix;
}
asyncTest(async () => {
const result = await Array.fromAsync(arrayLike, syncMap);
assert.compareArray(result, [0, 2, 8, 18], "sync mapfn should be applied to arraylike");
});
|
