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Table of Contents
Assignment Operators will work on values and variables. They are the special symbols that hold arithmetic, logical, and bitwise computations. The value which the operator operates is referred to as the Operand.
Read this article about Assignment Operators in Python
The assignment operator will function to provide value to variables. The table below is about the different types of Assignment operator
+= | will add right side operand with left side operand, assign to left operand | a+=b |
= | It will assign the value of the right side of the expression to the left side operand | x=y+z |
-= | can subtract the right operand from the left operand and then assign it to the left operand: True if both operands are equal | a -= b |
*= | can subtract the right operand from the left operand and then assign it to the left operand: True if both operands are equal | a *= b |
/= | will divide the left operand with right operand and then assign to the left operand | a /= b |
%= | will divide the left operand with the right operand and then assign to the left operand | a %= b |
<<= | It functions bitwise left on operands and will assign value to the left operand | a <<= b |
>>= | This operator will perform right shift on operands and can assign value to the left operand | a >>= b |
^= | This will function the bitwise xOR operands and can assign value to the left operand | a ^= b |
|= | This will function Bitwise OR operands and will provide value to the left operand. | a |= b |
&= | This operator will perform Bitwise AND on operand and can provide value to the left operand | a&=b |
**= | operator will evaluate the exponent value with the help of operands an assign value to the left operand | a**=b |
Here we have listed each of the Assignment operators
This assign operator will provide the value of the right side of the expression to the left operand.
This Add and Assign operator will function to add the right side operand with the left side operator, and provide the result to the left operand.
This subtract and assign operator works to subtract the right operand from the left operand and give the result to the left operand.
This Multiply and assign will function to multiply the right operand with the left operand and will provide the result in the left operand.
This functions to divide the left operand and provides results at the left operand.
This operator functions using the modulus with the left and the right operand and provides results at the left operand.
This operator will divide the left operand with the right operand, and provide the result at the left operand.
This operator will function to evaluate the exponent and value with the operands and, provide output in the left operand.
This operator will function Bitwise AND on both the operand and provide the result on the left operand.
This operand will function Bitwise OR on the operand, and can provide result at the left operand.
This operator will function for Bitwise XOR on the operands, and provide result at the left operand.
This operator will function by providing the Bitwise shift on the operands and giving the result at the left operand.
This operator will function Bitwise left shift by providing the Bitwise left shift on the operands and giving the result on the left operand.
To conclude, different types of assignment operators are discussed in this. Beginners can improve their knowledge and understand how to apply the assignment operators through reading this.
Q1. what is an assignment statement in python.
Ans. It will calculate the expression list and can provide a single resulting object to each target list from left to right
Ans. The compound operator will do the operation of a binary operator and will save the result of the operation at the left operand.
Ans. Simple Assignment Statements and Reference Assignment Statements are the two types of assignment statements.
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Understanding the role of assignment operators in programming is like learning how to pass the baton in a relay race; it’s about transferring values into variables effectively and accurately. These operators are the bread and butter of programming languages, allowing you to store and update data as your code runs. Whether you’re new to coding or brushing up on your programming skills, grasping assignment operators is a must for writing efficient and effective code. Dive into this tutorial to unlock the full potential of manipulating data in your programs!
Table of contents
Assignment operators are a staple in the world of programming, serving as the means to assign values to variables. They are the equals signs and plus-equals equations that usher data into placeholders, ready to be manipulated and presented as needed.
These operators enable us to store values, update information on the fly, and maintain state within our programs. Without them, our code would be static and unresponsive – they are the dynamic force behind variable assignment and updating.
Learning about assignment operators is foundational to programming. They allow us to:
– Initiate and change variable values. – Create interactive and responsive programs. – Write more concise and readable code.
The most common assignment operator is the simple equals sign (=), which assigns the value on its right to the variable on its left. Here’s a straightforward example:
This operator is used to initialize variables, and it can also be used to reassign new values to existing variables:
Often, you’ll want to increase a variable’s value by a certain amount. This is where the addition assignment operator (+=) comes in:
It saves you from having to write the variable name twice, streamlining your code and making it easier to read.
Just like with addition, you might want to decrease a variable’s value. The subtraction assignment operator (-=) reduces a variable by the number on its right:
When you need to multiply a variable by a value and reassign the product back to the variable, you can use the multiplication assignment operator (*=):
This operator helps maintain clean code instead of using longer statements that can get cluttered quickly if you’re performing many calculations.
The division assignment operator (/=) divides a variable by a number and assigns the result to that variable:
Using this operator can simplify your code significantly, especially in cases where you need to perform successive divisions on the same variable.
Finally, there’s the modulus assignment operator (%=), which assigns the remainder of the division to the variable:
The modulus operator is particularly useful in algorithms where you need to find out if a number is even or odd or fit a value into a particular range.
Mastering these operators is like getting the keys to the kingdom of efficient and maintainable code. With these examples under your belt, you have taken a big step towards becoming a more proficient programmer. In the next section, we’ll explore some other assignment operators that are used less frequently but are just as important.
After mastering the basics, let’s dive into some more assignment operators that can further enhance your coding prowess. These may not be used as frequently, but they’re important for writing concise code and can be a real-time saver in many situations.
Exponentiation and Assignment : When you want to raise a variable to the power of a certain number, you could use the Math.pow method or simply use the exponentiation assignment operator (**=) to keep your code neater:
It’s a handy operator for mathematical calculations, especially when you’re dealing with exponential growth or compound interest calculations.
Bitwise Operators and Assignment : Bitwise assignment operators like <>=, and &= are a bit more niche, used for manipulating bits within binary representations of numbers:
These operators are largely used in low-level programming, graphics, cryptography, and where performance optimization is critical.
Logical AND (&&=) and OR (||=) Assignment : In the realm of JavaScript, ES2021 introduced logical assignment operators that combine logical operations with assignment. Here are some examples:
The ||= operator assigns the value on its right side to the variable if the variable is currently null, undefined, or false. The &&= operator does the opposite, updating the variable if it’s already truthy.
Nullish Coalescing Assignment (??=) Operator : Introduced along with the logical assignment operators, the nullish coalescing assignment operator (??=) only assigns a value to a variable if that variable is currently null or undefined—not merely falsy like the || operator:
This operator is particularly useful when you want to ensure that variables have default values without overriding falsy but valid values like 0 or an empty string.
Understanding and utilizing these operators can lead to cleaner, more efficient, and more readable code, a critical factor in program maintenance and development. Our journey through assignment operators has shown us that, while some might seem complex at first glance, they’re all designed to make a programmer’s life easier. Remember that as with all programming concepts, practice is key to getting comfortable with these tools, so feel free to use this guide as a starting block for your exploration.
Understanding the behavior of assignment operators in edge cases can deepen your knowledge and help you to write better, more predictable code. Let’s examine some more practical examples, exploring how you can leverage these operators in less straightforward situations.
Consider how the += operator works with strings. It’s commonly used to concatenate strings effectively:
Now, let’s mix data types. When you add a number to a string, JavaScript converts the number to a string before concatenation:
Moving on to bitwise operators with more practical examples, let’s manipulate RGBA color values, which are often represented by 32-bit integers:
Bitwise operators are not limited to numbers. You can use them to toggle booleans or conditionally reset values:
Logical operators can help you write more concise conditional assignments. Consider setting default function parameters:
Even more nuanced is the nullish coalescing operator in conjunction with the Optional Chaining operator (?.) . This union elegantly handles cases where nested structures might lead to runtime errors:
Lastly, let’s look at a complex but common use case with destructuring and the spread operator to update state in a JavaScript object:
These examples reveal how assignment operators can be combined with other JavaScript features to produce sophisticated and efficient data manipulation. They exemplify the power packed into these seemingly simple operators and how, with creativity and understanding, they can be wielded to solve complex programming challenges. Whether you’re manipulating strings, toggling booleans with bitwise operations, handling default values, or safely updating nested objects, assignment operators simplify your workflow and clarify your intent to others reading your code.
Embarking on the journey of coding can open a world of possibilities. If you’ve found a passion for programming and want to expand your skills beyond assignment operators, Zenva Academy is here to guide you every step of the way.
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In the digital tapestry of code, assignment operators are the threads that connect values to variables, creating the intricate patterns that bring applications to life. With the knowledge of these powerful tools, you’re now better equipped to write code that not only functions well but is efficient and easy to understand. As you continue to build and refine your programming skills, remember that each new concept you master is a stepping stone to more advanced and exciting challenges.
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C# examples, c# assignment operators, assignment operators.
Assignment operators are used to assign values to variables.
In the example below, we use the assignment operator ( = ) to assign the value 10 to a variable called x :
Try it Yourself »
The addition assignment operator ( += ) adds a value to a variable:
A list of all assignment operators:
Operator | Example | Same As | Try it |
---|---|---|---|
= | x = 5 | x = 5 | |
+= | x += 3 | x = x + 3 | |
-= | x -= 3 | x = x - 3 | |
*= | x *= 3 | x = x * 3 | |
/= | x /= 3 | x = x / 3 | |
%= | x %= 3 | x = x % 3 | |
&= | x &= 3 | x = x & 3 | |
|= | x |= 3 | x = x | 3 | |
^= | x ^= 3 | x = x ^ 3 | |
>>= | x >>= 3 | x = x >> 3 | |
<<= | x <<= 3 | x = x << 3 |
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What is an assignment operator in c.
Assignment Operators in C are used to assign values to the variables. They come under the category of binary operators as they require two operands to operate upon. The left side operand is called a variable and the right side operand is the value. The value on the right side of the "=" is assigned to the variable on the left side of "=". The value on the right side must be of the same data type as the variable on the left side. Hence, the associativity is from right to left.
In this C tutorial , we'll understand the types of C programming assignment operators with examples. To delve deeper you can enroll in our C Programming Course .
Before going in-depth about assignment operators you must know about operators in C. If you haven't visited the Operators in C tutorial, refer to Operators in C: Types of Operators .
There are two types of assignment operators in C:
+= | addition assignment | It adds the right operand to the left operand and assigns the result to the left operand. |
-= | subtraction assignment | It subtracts the right operand from the left operand and assigns the result to the left operand. |
*= | multiplication assignment | It multiplies the right operand with the left operand and assigns the result to the left operand |
/= | division assignment | It divides the left operand with the right operand and assigns the result to the left operand. |
%= | modulo assignment | It takes modulus using two operands and assigns the result to the left operand. |
There can be five combinations of bitwise operators with the assignment operator, "=". Let's look at them one by one.
&= | bitwise AND assignment | It performs the bitwise AND operation on the variable with the value on the right |
|= | bitwise OR assignment | It performs the bitwise OR operation on the variable with the value on the right |
^= | bitwise XOR assignment | It performs the bitwise XOR operation on the variable with the value on the right |
<<= | bitwise left shift assignment | Shifts the bits of the variable to the left by the value on the right |
>>= | bitwise right shift assignment | Shifts the bits of the variable to the right by the value on the right |
Practice problems on assignment operators in c, 1. what will the value of "x" be after the execution of the following code.
The correct answer is 52. x starts at 50, increases by 5 to 55, then decreases by 3 to 52.
The correct answer is 144. After right-shifting 73 (binary 1001001) by one and then left-shifting the result by two, the value becomes 144 (binary 10010000).
While performing arithmetic operations with the same variable, use compound assignment operators
When mixing assignments with other operations, use parentheses to ensure the correct order of evaluation.
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The assignment operator allows us to change the value of a modifiable data object (for beginning programmers this typically means a variable). It is associated with the concept of moving a value into the storage location (again usually a variable). Within C++ programming language the symbol used is the equal symbol. But bite your tongue, when you see the = symbol you need to start thinking: assignment. The assignment operator has two operands. The one to the left of the operator is usually an identifier name for a variable. The one to the right of the operator is a value.
The value 21 is moved to the memory location for the variable named: age. Another way to say it: age is assigned the value 21.
The item to the right of the assignment operator is an expression. The expression will be evaluated and the answer is 14. The value 14 would assigned to the variable named: total_cousins.
The expression to the right of the assignment operator contains some identifier names. The program would fetch the values stored in those variables; add them together and get a value of 44; then assign the 44 to the total_students variable.
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C++ Relational and Logical Operators
C++ Ternary Operator
C++ Bitwise Operators
C++ Operator Precedence and Associativity
Operators are symbols that perform operations on variables and values. For example, + is an operator used for addition, while - is an operator used for subtraction.
Operators in C++ can be classified into 6 types:
Arithmetic operators are used to perform arithmetic operations on variables and data. For example,
Here, the + operator is used to add two variables a and b . Similarly there are various other arithmetic operators in C++.
Operator | Operation |
---|---|
Addition | |
Subtraction | |
Multiplication | |
Division | |
Modulo Operation (Remainder after division) |
Here, the operators + , - and * compute addition, subtraction, and multiplication respectively as we might have expected.
/ Division Operator
Note the operation (a / b) in our program. The / operator is the division operator.
As we can see from the above example, if an integer is divided by another integer, we will get the quotient. However, if either divisor or dividend is a floating-point number, we will get the result in decimals.
% Modulo Operator
The modulo operator % computes the remainder. When a = 9 is divided by b = 4 , the remainder is 1 .
Note: The % operator can only be used with integers.
C++ also provides increment and decrement operators: ++ and -- respectively.
For example,
Here, the code ++num; increases the value of num by 1 .
In the above program, we have used the ++ and -- operators as prefixes (++a and --b) . However, we can also use these operators as postfix (a++ and b--) .
To learn more, visit increment and decrement operators .
In C++, assignment operators are used to assign values to variables. For example,
Here, we have assigned a value of 5 to the variable a .
Operator | Example | Equivalent to |
---|---|---|
3. c++ relational operators.
A relational operator is used to check the relationship between two operands. For example,
Here, > is a relational operator. It checks if a is greater than b or not.
If the relation is true , it returns 1 whereas if the relation is false , it returns 0 .
Operator | Meaning | Example |
---|---|---|
Is Equal To | gives us | |
Not Equal To | gives us | |
Greater Than | gives us | |
Less Than | gives us | |
Greater Than or Equal To | give us | |
Less Than or Equal To | gives us |
Note : Relational operators are used in decision-making and loops.
Logical operators are used to check whether an expression is true or false . If the expression is true , it returns 1 whereas if the expression is false , it returns 0 .
Operator | Example | Meaning |
---|---|---|
expression1 expression2 | Logical AND. True only if all the operands are true. | |
expression1 expression2 | Logical OR. True if at least one of the operands is true. | |
expression | Logical NOT. True only if the operand is false. |
In C++, logical operators are commonly used in decision making. To further understand the logical operators, let's see the following examples,
Explanation of logical operator program
In C++, bitwise operators are used to perform operations on individual bits. They can only be used alongside char and int data types.
Operator | Description |
---|---|
Binary AND | |
Binary OR | |
Binary XOR | |
Binary One's Complement | |
Binary Shift Left | |
Binary Shift Right |
To learn more, visit C++ bitwise operators .
Here's a list of some other common operators available in C++. We will learn about them in later tutorials.
Operator | Description | Example |
---|---|---|
returns the size of data type | ||
returns value based on the condition | ||
represents memory address of the operand | ||
accesses members of struct variables or class objects | ||
used with pointers to access the class or struct variables | ||
prints the output value | ||
gets the input value |
Sorry about that.
C++ Tutorial
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I'm trying to understand the purpose of overloading some operators in C++. Conceptually, an assignment statement can be easily implemented via:
In fact, often, the copy-and-swap implementation is the implementation of assignment in real code.
Why, then, does C++ allow the programmer to overload the assignment operator, instead of just performing the above?
Was it intended to allow a scenario in which assignment is faster than destruction + construction? If so, when does that happen? And if not, then what use case was it intended to support?
1) Reference counting
Suppose you have a resource that is ref-counted and it is wrapped in objects.
2) Or you just want to copy the fields without fancy semantics.
In both cases the code runs much faster. In the second case the effect is similar.
3) Also what about types... Use the operator to handle assigning other types to your type.
first, note that "Destruction of the old object followed by copy construction of the new object" is not exception safe.
but re "Copy construction of the new object, followed by a swap with the old object, followed by destruction of the old object", that's the swap idiom for implementing an assignment operator, and it's exception safe if done correctly.
in some cases a custom assignment operator can be faster than the swap idiom. for example, direct arrays of POD type can't really be swapped except by way of lower level assignments. so there for the swap idiom you can expect an overhead proportional to the array size.
however, historically there wasn't much focus on swapping and exception safety.
bjarne wanted exceptions originally (if i recall correctly), but they didn't get into the language until 1989 or thereabouts. so the original c++ way of programming was more focused on assignments. to the degree that a failing constructor signalled its failure by assigning 0 to this … i think , that in those days your question would not have made sense. it was just assignments all over.
typewise, some objects have identity, and others have value. it makes sense to assign to value objects, but for identity objects one typically wants to limit the ways that the object can be modified. while this doesn't require the ability to customize copy assignment (only to make it unavailable), with that ability one doesn't need any other language support.
and i think likewise for any other specific reasons one can think of: probably no such reason really requires the general ability, but the general ability is sufficient to cover it all, so it lowers the overall language complexity.
a good source to get more definitive answer than my hunches, recollections and gut feelings, is bjarne's "the design and evolution of c++" book.
probably the question has a definitive answer there.
Destruction of the old object, followed by copy construction of the new, will not usually work. And the swap idiom is guaranteed not to work unless the class provides a special swap function— std::swap uses assignment in its unspecialized implementation, and using it directly in the assignment operator will lead to endless recursion.
And of course, the user may want to do something special, e.g. make the assignment operator private, for example.
And finally, what is almost certainly an overruling reason: the default assignment operator has to be compatible with C.
Actually, after seeing juanchopanza's answer (which was deleted), I think I ended up figuring it out myself.
Copy-assignment operators allow classes like basic_string to avoid allocating resources unnecessarily when they can re-use them (in this case, memory).
So when you assign to a basic_string , an overloaded copy assignment operator would avoid allocating memory, and would just copy the string data directly to the existing buffer.
If the object had to be destroyed and constructed again, the buffer would have to be reallocated, which would be potentially much more costly for a small string.
(Note that vector could benefit from this too, but only if it knew that the elements' copy constructors would never throw exceptions. Otherwise it would need to maintain its exception safety and actually perform a copy-and-swap.)
It allows you to use assignment of other types as well. You could have a class Person with an assignment operator that assigns an ID.
But besides that, you don't always want to copy all the members as they are.
The default assignment only does a shallow copy. For example, if the class contains pointers, or locks, you dont always want to copy them from the other object. Usually when you have pointers you want to use a deep copy, and maybe create a copy of the object that the pointers are pointed to. And if you have locks, you want them to be specific to the object, and you don't want to copy their state from the other object.
It is actually a common practice to provide your own copy constructor and assignment operator if your class holds pointers as members.
I have used it often as a conversion constructor but with already existing objects. i.e assigning member variable type, etc to an object.
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An assignment operator is an operator that is used to assign some value to a variable. Like normally in Python, we write "a = 5" to assign value 5 to variable 'a'. Augmented assignment operators have a special role to play in Python programming. It basically combines the functioning of the arithmetic or bitwise operator with the assignment operator
Assignment operators are used in programming to assign values to variables. We use an assignment operator to store and update data within a program. They enable programmers to store data in variables and manipulate that data. The most common assignment operator is the equals sign (=), which assigns the value on the right side of the operator to ...
The central component of an assignment statement is the assignment operator. This operator is represented by the = symbol, which separates two operands: A variable ; A value or an expression that evaluates to a concrete value; Operators are special symbols that perform mathematical, logical, and bitwise operations in a programming language.
Different types of assignment operators are shown below: 1. "=": This is the simplest assignment operator. This operator is used to assign the value on the right to the variable on the left. Example: a = 10; b = 20; ch = 'y'; 2. "+=": This operator is combination of '+' and '=' operators. This operator first adds the current ...
Assignment Operator: An assignment operator is the operator used to assign a new value to a variable, property, event or indexer element in C# programming language. Assignment operators can also be used for logical operations such as bitwise logical operations or operations on integral operands and Boolean operands. Unlike in C++, assignment ...
Arithmetic operators perform the common mathematical operation on the numeric operands. The arithmetic operators return the type of result depends on the type of operands, as below. If both operands are integers, then the result is an integer and no conversion is needed. The following table lists all the arithmetic operators in Python:
Python Assignment Operators. Assignment operators are used to assign values to variables: Operator. Example. Same As. Try it. =. x = 5. x = 5.
variable operator value; Types of Assignment Operators in Java. The Assignment Operator is generally of two types. They are: 1. Simple Assignment Operator: The Simple Assignment Operator is used with the "=" sign where the left side consists of the operand and the right side consists of a value. The value of the right side must be of the same data type that has been defined on the left side.
In C++, the assignment operator forms the backbone of many algorithms and computational processes by performing a simple operation like assigning a value to a variable. It is denoted by equal sign ( = ) and provides one of the most basic operations in any programming language that is used to assign some value to the variables in C++ or in other ...
The simple assignment operator is the most commonly used operator in Python. It is used to assign a value to a variable. The syntax for the simple assignment operator is: variable = value. Here, the value on the right-hand side of the equals sign is assigned to the variable on the left-hand side. For example.
2. Java Assignment Operators. Assignment operators are used in Java to assign values to variables. For example, int age; age = 5; Here, = is the assignment operator. It assigns the value on its right to the variable on its left. That is, 5 is assigned to the variable age. Let's see some more assignment operators available in Java.
Discussion. The assignment operator allows us to change the value of a modifiable data object (for beginning programmers this typically means a variable). It is associated with the concept of moving a value into the storage location (again usually a variable). Within C++ programming language the symbol used is the equal symbol.
The language definition simply states: An assignment operator stores a value in the object designated by the left operand. (6.5.16, para 3). The only general constraint is that the left operand be a modifiable lvalue. An lvalue can correspond to a register (which has no address) or an addressable memory location.
To assign a value to a variable, use the basic assignment operator (=). It is the most fundamental assignment operator in Java. It assigns the value on the right side of the operator to the variable on the left side. Example: int x = 10; int x = 10; In the above example, the variable x is assigned the value 10.
Assignment Operators will work on values and variables. They are the special symbols that hold arithmetic, logical, and bitwise computations. The value which the operator operates is referred to as the Operand. Read this article about Assignment Operators in Python. What are Assignment Operators?
Example 2: Assignment Operators # assign 10 to a a = 10 # assign 5 to b b = 5 # assign the sum of a and b to a a += b # a = a + b print(a) # Output: 15. Here, we have used the += operator to assign the sum of a and b to a. Similarly, we can use any other assignment operators as per our needs.
Basic Assignment Operator. The most common assignment operator is the simple equals sign (=), which assigns the value on its right to the variable on its left. Here's a straightforward example: let x = 5; console.log(x); // Outputs: 5. This operator is used to initialize variables, and it can also be used to reassign new values to existing variables:
Assignment operators are used to assign value to a variable. The left side of an assignment operator is a variable and on the right side, there is a value, variable, or an expression. It computes the outcome of the right side and assign the output to the variable present on the left side. C supports following Assignment operators: 1.
Assignment operators are used to assign values to variables. In the example below, we use the assignment operator (=) to assign the value 10 to a variable called x: Example int x = 10;
Assignment Operators in C are used to assign values to the variables. They come under the category of binary operators as they require two operands to operate upon. The left side operand is called a variable and the right side operand is the value. The value on the right side of the "=" is assigned to the variable on the left side of "=".
Discussion. The assignment operator allows us to change the value of a modifiable data object (for beginning programmers this typically means a variable). It is associated with the concept of moving a value into the storage location (again usually a variable). Within C++ programming language the symbol used is the equal symbol.
C++ Operators. Operators are symbols that perform operations on variables and values. For example, + is an operator used for addition, while - is an operator used for subtraction. Operators in C++ can be classified into 6 types: Arithmetic Operators. Assignment Operators.
I'm trying to understand the purpose of overloading some operators in C++. Conceptually, an assignment statement can be easily implemented via: Destruction of the old object followed by copy construction of the new object. Copy construction of the new object, followed by a swap with the old object, followed by destruction of the old object.