Article From:https://segmentfault.com/q/1010000011710961
Question:

Do not know, ask, see source code found

xxxxx: !+Cookies.get(‘xxxxxx’)

In this sentence! What does it mean?

Answer 0:

+Can turn back into numbers (Number type).
!Is to reverse the boolean type.
Specifically, we need to see what we are doing.
I don’t know why I want to change so much.

!+'test'// true
!'test' // false
!+'0' //true
!'0' // false

Answer 1:

+Is to let strings become numeric types.
!It is the opposite.

Look at specific fields for understanding.
Here it should be to determine if a value is 0.

Link of this Article: + + what kind of grammar is this?

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