testsrc.doctests.480758.doctest Maven / Gradle / Ivy
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A distribution of rhino which releases snapshots from a submodule folder containing forked sources.
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
js> function primBeget(proto) {
> if (proto === null) { fail("Cannot beget from null."); }
> if (proto === (void 0)) { fail("Cannot beget from undefined."); }
> function F() {}
> F.prototype = proto;
> var result = new F();
> return result;
> }
js> var x = [1].concat(primBeget(Array.prototype));
js> x
1,
js> x[1]
js> typeof x[1]
object
js> x[1] instanceof Array
true