Boolean vs !!

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Testing in
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Boolean
for (var i = 1000; i--;) {
  var a = Boolean(i);
  a = !a;
}
ready
!!
for (var i = 1000; i--;) {
  var a = !! i;
  a = !a;
}
ready
<>
for (var i = 1000; i--;) {
  var a = i > 0;
  a = !a;
}
ready

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