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// 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.filter
es5id: 15.4.4.20-9-c-iii-1-6
description: >
Array.prototype.filter - values of 'to' are accessed during each
iteration when 'selected' is converted to true and not prior to
starting the loop
---*/
var toIndex = [];
var called = 0;
//By below way, we could verify that 'to' would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
function callbackfn(val, idx, obj) {
called++;
//Each position should be visited one time, which means 'to' is accessed one time during iterations.
if (toIndex[idx] === undefined) {
//when current position is visited, its previous index should has been visited.
if (idx !== 0 && toIndex[idx - 1] === undefined) {
return false;
}
toIndex[idx] = 1;
return true;
} else {
return false;
}
}
var newArr = [11, 12, 13, 14].filter(callbackfn, undefined);
assert.sameValue(newArr.length, 4, 'newArr.length');
assert.sameValue(called, 4, 'called');
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