The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
let res = stack.join('');
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Pavitt says what we feel to be destiny may be a pull from our nervous system recognising something that hurt us before and trying to fix it, a pattern therapists call a trauma bond.
传统的防窥膜正是从这个角度来入手的。
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