Sunday, July 22, 2018

Typescript Bitwise and Assignment Operators explained

Bitwise operators 

these are to evaluate bit based operations. Sometimes it is required to evaluate bits of integer values, We have to use bitwise operators. There are sevaral operators like in many programming languages. This operator work with 32 bits of an integer
Syntax Operand Operator Operand2
 Let assume that Value of A and B are 5 and 10
Operator Title Description Example
& Bitwise ANd Evaluates And operation on bits Integers parameters A & B is 0
| Bitwise OR Evaluates Or operation on bits Integers parameters A | B is 15
^ Bitwise XOR Evaluates exclusive operation on bits of Integers parameters A ^ B is 15
~ Bitwise NOT Not operator on bits of parameter ~A is -6
<< Left Shifts First shifts left bits of the first opernad by second oeprand times and remaining bits will be filled with zero A<
>> Right Shifts First shifts right bits of the first opernad by second oeprand times and remaining bits will be filled with zero A>>B is 0
>>> Right Shifts with zero Evaluation is right shift + left Bits shifted replaced with zero A>>>B is 0
Example

var A = 5
var B = 10
console.log(A & B) // returns 0
console.log(A | B) // returns 15
console.log(~A) // returns -6
console.log(A^B) // returns 15
console.log(A<>B) // returns 0
console.log(A>>>B) // returns 0

Assignment Operators

Assignment operators do some operations and  assign the value from left to right  values

Syntax 
Operand1 Assignment-operator Operand2

Operator Title Description Example
= Simple assign Evaluates And operation on bits Integers parameters a=2 and value of a is 2
+= Add And assign Add right operand to left and assign the result to left operand a+=2 and value of a is equal to a=a+2
-= Subscrtract and assign Subtract right operand to left and assign the result to left operand a-=2 and value of a is equal to a=a+2
*= Multiply And assign Multiply right operand with left and assign the result to left operand a*a=2 is equal to a=a*2
/= Divide and assign Divide right operand with left and assign the result to left operand c/=2 is equal to c=c/2
%= Modulus And Assign Divide right operand with left and assign the result of the remainder to left operand c%=2 is equal to c=c%2
<<= Left Shifts And assign Perform left shift and result is assigned to left operand c<<=2 is equal to c=c<<2 td="">
>>= Right Shifts And assign Perform Right shift and result is assigned to left operand c>>=2 is equal to c=c>>2
&= Bitwise And Assign Perform Bitwise And and the result is assigned to left operand c&=2 is equal to c=c&2
^= Bitwise Exclusive And Assign Perform Bitwise Exclusive OR and result is assigned to left operand c^=2 is equal to c=c^2
|= Bitwise Or And Assign Perform Bitwise inclusive OR and the result is assigned to left operand c|=2 is equal to c=c|2

Comma Operator 

This operator symbol is,(comma). This is used to perform the multiple expressions and return the last expression value. Multiple expression is evaluated from left to right. 
Syntax :- (Operand/Expression,Operand2) Example
var variable =10;
variable = (--variable, variable);
console.log(variable); // outputs 9