What does “somevar >> 0” mean?

问题:

What does the notation somevar >> 0 mean in javascript?

Thanks

回答1:

In a >> b, >> is a bitwise operator that shifts a in binary representation b (https://developer.mozilla.org/en/JavaScript/Reference/Operators/Bitwise_Operators

回答2:

Bitwise right shift. Although somevar >> 0 looks weird.

回答3:

It's a bitwise operator. In this case, for shifting the first operand in binary representation the number of bits to the right specified in the second operand, discarding bits shifted off.

With a 0 as second operand, I guess it has no effect (shifting 0 bits, is getting the same value?).

I was wrong with this last. As explained at this @Gumbo's comment.

文章来源: What does “somevar >> 0” mean?