tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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semantics-07.js (475B)

      1 // Deleting the .next method of an iterator in the middle of a for-of loop
      2 // doesn't cause a TypeError at the next iteration.
      3 
      4 load(libdir + "asserts.js");
      5 load(libdir + "iteration.js");
      6 
      7 var iterProto = Object.getPrototypeOf([][Symbol.iterator]());
      8 var s = '';
      9 for (var v of ['duck', 'duck', 'duck', 'goose', 'and now you\'re it']) {
     10    s += v;
     11    if (v === 'goose')
     12        delete iterProto.next;
     13    s += '.';
     14 }
     15 assertEq(s, 'duck.duck.duck.goose.and now you\'re it.');