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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
// |reftest| shell-option(--enable-float16array)
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.reduce
description: >
callbackfn arguments using default accumulator (value at index 0)
info: |
22.2.3.20 %TypedArray%.prototype.reduce ( callbackfn [ , initialValue ] )
%TypedArray%.prototype.reduce is a distinct function that implements the same
algorithm as Array.prototype.reduce as defined in 22.1.3.19 except that the
this object's [[ArrayLength]] internal slot is accessed in place of performing
a [[Get]] of "length".
22.1.3.19 Array.prototype.reduce ( callbackfn [ , initialValue ] )
...
7. Else initialValue is not present,
a. Let kPresent be false.
b. Repeat, while kPresent is false and k < len
...
iii. If kPresent is true, then
1. Let accumulator be ? Get(O, Pk).
...
8. Repeat, while k < len
...
c. If kPresent is true, then
...
i. Let accumulator be ? Call(callbackfn, undefined, « accumulator, kValue,
k, O »).
...
includes: [testTypedArray.js]
features: [TypedArray]
---*/
testWithTypedArrayConstructors(function(TA) {
var sample = new TA([42, 43, 44]);
var results = [];
sample.reduce(function(accumulator) {
results.push(arguments);
return accumulator - 1;
});
assert.sameValue(results.length, 2, "results.length");
assert.sameValue(results[0].length, 4, "results[1].length");
assert.sameValue(results[0][0], 42, "results[1][0] - accumulator");
assert.sameValue(results[0][1], 43, "results[1][1] - kValue");
assert.sameValue(results[0][2], 1, "results[1][2] - k");
assert.sameValue(results[0][3], sample, "results[1][3] - this");
assert.sameValue(results[1].length, 4, "results[2].length");
assert.sameValue(results[1][0], 41, "results[2][0] - accumulator");
assert.sameValue(results[1][1], 44, "results[2][1] - kValue");
assert.sameValue(results[1][2], 2, "results[2][2] - k");
assert.sameValue(results[1][3], sample, "results[2][3] - this");
});
reportCompare(0, 0);
|