| // 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: > |
| Returns [0] without calling callbackfn if length is 1 and initialValue is not |
| present. |
| 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, |
| ... |
| b. Repeat, while kPresent is false and k < len |
| ... |
| iii. If kPresent is true, then |
| 1. Let accumulator be ? Get(O, Pk). |
| iv. Increase k by 1. |
| ... |
| 8. Repeat, while k < len |
| ... |
| 9. Return accumulator. |
| includes: [testTypedArray.js] |
| features: [TypedArray] |
| ---*/ |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var called = false; |
| var result = new TA([42]).reduce(function() { |
| called = true; |
| }); |
| |
| assert.sameValue(result, 42); |
| assert.sameValue(called, false); |
| }); |