This document discusses JavaScript operators. It covers unary, binary, and ternary operators. It describes each operator's associativity, number of operands, and operand and result types. Common operators covered include arithmetic, comparison, logical, bitwise, assignment, and more.

2. JAVASCRIPT
OPERATORS
Victor Perez

3. / TO PRIMITIVE

4. ⁄⁄⁄
● Preferred type, string or number
○ if no preferred type, default number except for instances of Date
CONVERSION
TO PRIMITIVE

5. ⁄⁄⁄
● plus ( + )
● comparison ( <, <=, >, >=, ==, != )
○ in- and equality only if both aren't a object
PLUS AND COMPARISON
TO PRIMITIVE

6. / OPERATORS

7. ⁄⁄⁄
● Organized by operator precedence
● Punctuation characters
○ like: +, =, %
● Keywords
○ like: delete, void, typeof
● Associativity
○ LTR ( Left-to-right ) and RTL ( Right-to-left )
● Number of operands
○ 1 - 3
● Types
○ input type(s) → result type
INTRODUCTION
OPERATORS

8. ⁄⁄⁄
INCREMENT
OPERATORS
● Pre- or post-increment
Operator Associativity Number of operands Types
++ Right-to-left 1 lvalue → number

9. ⁄⁄⁄
DECREMENT
OPERATORS
● Pre- or post-decrement
Operator Associativity Number of operands Types
-- Right-to-left 1 lvalue → number

10. ⁄⁄⁄
UNARY MINUS
OPERATORS
● Changes the sign of the result
Operator Associativity Number of operands Types
- Right-to-left 1 number → number

11. ⁄⁄⁄
UNARY PLUS
OPERATORS
● Converts to a number
● See type conversion last presentation http://www.slideshare.net/victorandresperez/java-script-introduction-34306832/26
Operator Associativity Number of operands Types
+ Right-to-left 1 number → number

12. ⁄⁄⁄
BITWISE NOT
OPERATORS
● Reversing all bits
● -( x + 1)
Operator Associativity Number of operands Types
~ Right-to-left 1 int → int

13. ⁄⁄⁄
DELETE
OPERATORS
● Removes a property
○ returns true if the property was successful deleted
Operator Associativity Number of operands Types
delete Right-to-left 1 lvalue→ boolean

14. ⁄⁄⁄
TYPEOF
OPERATORS
● Determine type of operand
○ http://www.slideshare.net/victorandresperez/java-script-introduction-34306832/25
Operator Associativity Number of operands Types
typeof Right-to-left 1 any → string

15. ⁄⁄⁄
VOID
OPERATORS
● Evaluates its operand and then returns undefined
Operator Associativity Number of operands Types
void Right-to-left 1 any → undefined

16. ⁄⁄⁄
MULTIPLY, DIVIDE & REMAINDER
OPERATORS
● Multiplication
● Division
● Modulo ( remainder after division )
Operator Associativity Number of operands Types
* Left-to-right 2 number, number → number
/ Left-to-right 2 number, number → number
% Left-to-right 2 number, number → number

17. ⁄⁄⁄
ADD & SUBTRACT
OPERATORS
● Addition ( + )
● Subtraction ( - )
Operator Associativity Number of operands Types
+ Left-to-right 2 number, number → number
- Left-to-right 2 number, number → number

18. ⁄⁄⁄
CONCATENATE STRINGS
OPERATORS
● Will concatenate both strings to a new string
Operator Associativity Number of operands Types
+ Left-to-right 2 string,string→ string

19. ⁄⁄⁄
SHIFT LEFT
OPERATORS
● moves all bits in its first operand to the left by the number of places in the second operand
● between 0 and 31
● x * 2^y
Operator Associativity Number of operands Types
<< Left-to-right 2 int, int→ int

20. ⁄⁄⁄
SHIFT RIGHT WITH SIGN
OPERATORS
● moves all bits in its first operand to the right by the number of places specified in the second operand
● between 0 and 31
Operator Associativity Number of operands Types
>> Left-to-right 2 int, int→ int

21. ⁄⁄⁄
SHIFT RIGHT WITH ZERO FILL
OPERATORS
● Same as >> operator, except that the bits shifted in on the left are always zero
Operator Associativity Number of operands Types
>>> Left-to-right 2 int, int→ int

22. ⁄⁄⁄
COMPARE NUMBERS
OPERATORS
● Less than ( < ), greater than ( > ), less than or equal ( <= ), greater than or equal ( >= )
Operator Associativity Number of operands Types
< Left-to-right 2 number, number→ boolean
> Left-to-right 2 number, number→ boolean
<= Left-to-right 2 number, number→ boolean
>= Left-to-right 2 number, number→ boolean

23. ⁄⁄⁄
COMPARE STRINGS
OPERATORS
● Less than ( < ), greater than ( > ), less than or equal ( <= ), greater than or equal ( >= )
● 16-bit integers
● Capital ASCII is less than lowercase ASCII
Operator Associativity Number of operands Types
< Left-to-right 2 string, string → boolean
> Left-to-right 2 string, string → boolean
<= Left-to-right 2 string, string → boolean
>= Left-to-right 2 string, string → boolean

24. ⁄⁄⁄
INSTANCEOF
OPERATORS
● Checks of the left operand is an instanceof the right operand
Operator Associativity Number of operands Types
instanceof Left-to-right 2 object,function→ boolean

25. ⁄⁄⁄
IN
OPERATORS
● Checks of the left-side value is a property in the right-side value
Operator Associativity Number of operands Types
in Left-to-right 2 string,object→ boolean

26. ⁄⁄⁄
EQUALITY
OPERATORS
● Checks of both operands are equal
● 2 objects are check by references
● Type conversion if types are not equal
Operator Associativity Number of operands Types
== Left-to-right 2 any,any→ boolean

27. ⁄⁄⁄
INEQUALITY
OPERATORS
● Checks of both operands are not equal
● 2 objects are check by references
● Type conversion if types are not equal
Operator Associativity Number of operands Types
!= Left-to-right 2 any,any→ boolean

28. ⁄⁄⁄
STRICT EQUALITY
OPERATORS
● Checks of both operands are equal
● 2 objects are check by references
Operator Associativity Number of operands Types
=== Left-to-right 2 any,any→ boolean

29. ⁄⁄⁄
STRICT INEQUALITY
OPERATORS
● Checks of both operands are not equal
● 2 objects are check by references
Operator Associativity Number of operands Types
!== Left-to-right 2 any,any→ boolean

30. ⁄⁄⁄
BITWISE AND
OPERATORS
● Performs the AND operation on each pair of bits
○ yields 1 if both bits are 1, else yields 0
Operator Associativity Number of operands Types
& Left-to-right 2 int,int→ int

31. ⁄⁄⁄
BITWISE XOR
OPERATORS
● Performs the XOR operation on each pair of bits
○ yields 1 if both bits not equal, else yields 0
Operator Associativity Number of operands Types
^ Left-to-right 2 int,int→ int

32. ⁄⁄⁄
BITWISE OR
OPERATORS
● Performs the OR operation on each pair of bits
○ yields 0 if both bits are 0, else yields 1
Operator Associativity Number of operands Types
| Left-to-right 2 int,int→ int

33. ⁄⁄⁄
LOGICAL AND
OPERATORS
● Returns a “truthy” or “falsy” value
● Returns the left operand if the left operand is “falsy”, else return right operand
● “falsy” values are: false, null, undefined, 0, -0, NaN and empty string ( "" )
Operator Associativity Number of operands Types
&& Left-to-right 2 any,any→ any

34. ⁄⁄⁄
LOGICAL OR
OPERATORS
● Returns a “truthy” or “falsy” value
● Returns the left operand if the left operand is “truthy”, else return right operand
● “falsy” values are: false, null, undefined, 0, -0, NaN and empty string ( "" )
Operator Associativity Number of operands Types
|| Left-to-right 2 any,any→ any

35. ⁄⁄⁄
CONDITIONAL OPERATOR
OPERATORS
● The only ternary operator ( three operands )
● if first operand is “truly”, then the second operand is evaluated, else the third operand
Operator Associativity Number of operands Types
?: Right-to-left 3 boolean,any,any→ any

36. ⁄⁄⁄
ASSIGNMENT
OPERATORS
● Assign to a variable or property
Operator Associativity Number of operands Types
= Right-to-left 2 lvalue,any→ any

37. ⁄⁄⁄
OPERATE AND ASSIGN
OPERATORS
● a operate= b is the same as a = a operate b
Operators Associativity Number of operands Types
*=, /=, %=, +=, -=, &=, ^=,
|=, <<=, >>=, >>>=
Right-to-left 2 lvalue,any→ any
Operator Example Equivalent
+=
-=
*=
/=
%=
<<=
>>=
>>>=
&=
|=
^=
a += b
a -= b
a *= b
a /= b
a %= b
a <<= b
a >>= b
a >>>= b
a &= b
a |= b
a ^= b
a = a + b
a = a - b
a = a * b
a = a / b
a = a % b
a = a << b
a = a >> b
a = a >>> b
a = a & b
a = a | b
a = a ^ b

38. ⁄⁄⁄
COMMA
OPERATORS
● Evaluates the left operand, then the right operand and then returns the value of the right operand.
Operators Associativity Number of operands Types
, Left-to-right 2 any,any→ any

39. / QUESTIONS?

40. THANKS
@VICTORAPEREZ
vpjs@victor-perez.nl