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How to: The ~ operator?
What's the ~ operator does in javascript?
input
alert(~1)
output is
-2
input
~function () {}()
output is
-1
I never heard about ~ operator in javascript
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https://developer.mozilla.org/en/JavaScript/Reference/Operators/Bitwise_Operators
Bitwise NOT ~ a Inverts the bits of its operand.
I guess its fairly odd that a function returns -1, but what would you expect anyway.
TJHeuvel
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4The function call returns `undefined`. `undefined` is converted to `0` and `~0` is `-1`. – Felix Kling Aug 26 '11 at 08:33
2
This is the bitwise not operator that inverts the value of every bit in the integer. In binary a signed integer has the following representation:
00000001 = 1
11111110 = -2
See this wikipedia article.
trojanfoe
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The bitwise NOT operator (~) will take its operand, convert it to a 32-bit integer, and will invert each bit so that each 0 becomes a 1 and vice versa.
JohnJohnGa
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