JavaScript bitwise operators

Not

bitwise non, symbol is wavy line ~

function bar all bits of the binary number are non-operational, the corresponding decimal result is a negative value for the original 10 binary number and minus 1

Other operators feel less common, bitwise AND (&), bitwise OR (|), left (<<), Shift Right (>>), unsigned Right shift (>>>)

XOR (^), wherein the 10 binary number can be considered when the left to move, right to move with caution, symbolic problems

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Logical operators:

and

and operation, symbol for &&

That is true when both are true and the rest is false.

This can be written when you use the properties of an object in general.

obj&&obj.attr;

Indicates that the obj.attr is executed if obj exists

FN&&FN ();

The general callback function likes to write like this

Or

Or, as long as one is true, the symbol | |

Setting default values can be used this way

var a=x| | 1;

If x is not defined, it is the default value

JavaScript bitwise operators