| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-array.prototype.findindex |
| description: > |
| The range of elements processed is set before the first call to `predicate`. |
| info: | |
| 22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] ) |
| |
| ... |
| 6. If thisArg was supplied, let T be thisArg; else let T be undefined. |
| 7. Let k be 0. |
| 8. Repeat, while k < len |
| ... |
| d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)). |
| ... |
| ---*/ |
| |
| var arr = ['Shoes', 'Car', 'Bike']; |
| var results = []; |
| |
| arr.findIndex(function(kValue) { |
| if (results.length === 0) { |
| arr.splice(1, 1); |
| } |
| results.push(kValue); |
| }); |
| |
| assert.sameValue(results.length, 3, 'predicate called three times'); |
| assert.sameValue(results[0], 'Shoes'); |
| assert.sameValue(results[1], 'Bike'); |
| assert.sameValue(results[2], undefined); |
| |
| results = []; |
| arr = ['Skateboard', 'Barefoot']; |
| arr.findIndex(function(kValue) { |
| if (results.length === 0) { |
| arr.push('Motorcycle'); |
| arr[1] = 'Magic Carpet'; |
| } |
| |
| results.push(kValue); |
| }); |
| |
| assert.sameValue(results.length, 2, 'predicate called twice'); |
| assert.sameValue(results[0], 'Skateboard'); |
| assert.sameValue(results[1], 'Magic Carpet'); |