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Bruno Jouhier (2016-05-10T12:50:06.000Z)

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`??=` is cleaner and avoids problems when the default is falsy but not
undefined. But then we also need `??`.
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bjouhier at gmail.com (2016-05-10T12:51:04.337Z)

`??=` is cleaner and avoids problems when the default is falsy but not
`undefined`. But then we also need `??`.

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