| // Copyright (c) 2012 Ecma International. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-array.prototype.reduceright |
| description: > |
| Array.prototype.reduceRight returns initialValue if 'length' is 0 |
| and initialValue is present (subclassed Array, length overridden |
| with [0]) |
| ---*/ |
| |
| foo.prototype = new Array(1, 2, 3); |
| |
| function foo() {} |
| var f = new foo(); |
| |
| f.length = [0]; |
| |
| // objects inherit the default valueOf method of the Object object; |
| // that simply returns the itself. Since the default valueOf() method |
| // does not return a primitive value, ES next tries to convert the object |
| // to a number by calling its toString() method and converting the |
| // resulting string to a number. |
| // |
| // The toString( ) method on Array converts the array elements to strings, |
| // then returns the result of concatenating these strings, with commas in |
| // between. An array with no elements converts to the empty string, which |
| // converts to the number 0. If an array has a single element that is a |
| // number n, the array converts to a string representation of n, which is |
| // then converted back to n itself. If an array contains more than one element, |
| // or if its one element is not a number, the array converts to NaN. |
| |
| function cb() {} |
| assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)'); |
