https://www.digitalocean.com/community/tutorials/javascript-unary-operators-simple-and-useful
| Operator | Explanation |
|---|---|
Unary plus (+) | Tries to convert the operand into a number |
Unary negation (-) | Tries to convert the operand into a number and negates after |
Increment (++) | Adds one to its operand |
Decrement (--) | Decrements by one from its operand |
Logical NOT (!) | Converts to boolean value then negates it |
Bitwise NOT (~) | Inverts all the bits in the operand and returns a number |
typeof | Returns a string which is the type of the operand |
delete | Deletes specific index of an array or specific property of an object |
void | Discards a return value of an expression. |
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