What is the difference between string and stringbuilder in c#

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In C#, both string and StringBuilder are used to work with textual data, but they have different characteristics and are optimized for different scenarios. Here's an overview of the differences between the two:

Immutability:

String: In C#, a string is immutable, which means that once a string object is created, its value cannot be changed. Any operation that modifies a string actually creates a new string object.

StringBuilder: On the other hand, StringBuilder is mutable, allowing you to modify the contents of the string without creating a new object each time. This can be more efficient when you need to perform multiple modifications on a string.

Performance:

String: Since strings are immutable, performing operations such as concatenation or insertion can be inefficient because they require creating new string objects. In scenarios where you need to perform a large number of string manipulations, the performance can degrade due to memory allocations and object creation.

StringBuilder: StringBuilder is designed to address the performance issues associated with frequent string modifications. It provides methods such as Append, Insert, Replace, etc., which modify the underlying string buffer efficiently. By using StringBuilder, you can avoid unnecessary memory allocations and improve performance.

Usage:

String: string is commonly used when you have a fixed string value or when you need to perform operations that don't involve frequent modifications, such as string comparisons, searching, or substring extraction. It is also the preferred choice when working with string literals or constants.

StringBuilder: StringBuilder is useful when you need to perform frequent modifications on a string, such as building a dynamic string by appending or inserting values in a loop. It is particularly efficient when dealing with large strings or when you concatenate a significant number of smaller strings together.

In summary, if you have a scenario where you need to perform frequent modifications on a string, it is more efficient to use StringBuilder to avoid unnecessary object creation and improve performance. However, for scenarios involving fixed or unchanging strings, or when you need to perform operations that don't modify the string, using the string type is sufficient.

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what is deep copy and shallow copy In C#

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In C#, as in other programming languages, you may encounter the terms "deep copy" and "shallow copy" when working with objects and data structures. These two concepts refer to the different ways in which data can be copied from one variable to another. Let's take a closer look at what deep copy and shallow copy mean in C#, and when to use each one.

Shallow Copy

A shallow copy in C# creates a new object but does not create new copies of the objects within the original object. Instead, the new object contains references to the objects in the original object. Therefore, changes made to the original object will also affect the new object, and vice versa.

Here's an example to illustrate shallow copy in C#:

int[] originalArray = {1, 2, 3}; int[] newArray = (int[])originalArray.Clone(); // modify the original array originalArray[0] = 5; // both the original and new arrays have changed Console.WriteLine(string.Join(",", originalArray)); // 5,2,3 Console.WriteLine(string.Join(",", newArray)); // 1,2,3

In the example above, originalArray is an array of integers. We make a shallow copy of it using the Clone() method and casting the result to the array type, and store it in newArray. Then, we modify the first element of originalArray. As a result, both originalArray and newArray are updated because they both refer to the same underlying objects.

Deep Copy

A deep copy in C# creates a new object and recursively creates new copies of the objects within the original object. In other words, it creates a completely independent copy of the original object, so changes made to the original object will not affect the new object, and vice versa.

Here's an example to illustrate deep copy in C#:

using System; using System.Collections.Generic; using System.Linq; class Person { public string Name; public List<string> Hobbies; } class Program { static void Main(string[] args) { var originalPerson = new Person() { Name = "John", Hobbies = new List<string>() { "reading", "running" } }; var newPerson = new Person() { Name = originalPerson.Name, Hobbies = new List<string>(originalPerson.Hobbies) }; // modify the original person originalPerson.Name = "Jane"; originalPerson.Hobbies.Add("swimming"); // only the original person has changed, the new person remains unchanged Console.WriteLine(originalPerson.Name); // Jane Console.WriteLine(string.Join(",", originalPerson.Hobbies)); // reading,running,swimming Console.WriteLine(newPerson.Name); // John Console.WriteLine(string.Join(",", newPerson.Hobbies)); // reading,running } }

In the example above, we define a Person class with a name and a list of hobbies. We create a new instance of Person called original Person and initialize its name and hobbies. Then, we create a new instance of Person called newPerson and initialize its name to originalPerson.Name and its hobbies to a new list created from originalPerson.Hobbies. This creates a deep copy of original Person because the new list created from originalPerson.Hobbies is a new object.

Then, we modify the name and hobbies of original Person. As a result, only original Person is updated, and new Person remains unchanged.

When to Use Shallow Copy and Deep Copy

Which one you use depends

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8 Things You Don't Want to Hear About Difference between Html.Partial() and Html.RenderPartial() in ASP.NET MVC

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Html.Partial()

Html.Partial returns html string.

Html.Partial injects the html string of the partial view into the main view.

Performance is slow.

Html.Partial() need not to be inside the braces.

Html.RenderPartial()

Html.RenderPartial returns void.

Html.RenderPartial writes html in the response stream.

Perform is faster compared with HtmlPartial().

Html.RenderPartial must be inside braces @{ }.

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What Is loading program in c language and How Does It Work?

In this program, we will learn how to make c language loading program with graphical mode.

To understand this program, you must have this knowledge:

• Basic c
• function
• structure
• loop
• ascii

source code: loading program in c language

#include<stdio.h> #include<conio.h> #include<graphics.h> #include<dos.h> #include<stdlib.h> void LOAD(); struct det input(); void display(struct det); struct det { char string[50]; int roll_no; }; void main() { textcolor( LIGHTMAGENTA); struct det d2; clrscr(); printf("\t\t\tWelcome ancientcode\n"); printf("\t\t\tAncientcode1.blogspot.com\n"); getch(); textcolor(RED); d2=input(); clrscr(); LOAD(); textcolor(LIGHTBLUE); clrscr(); display(d2); getch(); } det input() { struct det d1; printf("\nEnter Your Name:"); gets(d1.string); printf("\nEnter Your Roll No:"); scanf("%d",d1.roll_no); return(d1); } void display(struct det d) { srand(time(0)); printf("\n\n\t\t\tWelcome User\n\n\n\n"); printf("\n User Id : %d\n",rand()); printf(" Name : %s\n",d.string); printf(" Roll No : %d",d.roll_no); } void LOAD() { _setcursortype(0); int j; for(j=30;j<=50;j++) { textbackground(WHITE); gotoxy(j,13); cprintf(" "); } gotoxy(34,14); printf(" LOADING...."); textbackground(LIGHTGREEN); for(j=30;j<=50;j++) { gotoxy(j,13); cprintf(" "); gotoxy(38,13); delay(100); } textbackground(0); gotoxy(34,14); printf(" COMPLETED "); gotoxy(27,16); printf("PRESS ANY KEY TO CONTINUE"); }

Remember: if you run this code you have a need to turbo c/c++.

Click: Turbo

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How To Teach palindrome program in c Like A Pro

In this post, we will talk about the palindrome program in c And we will know. What is a palindrome? And how to make the Palindrome program.

To understand this program, you must have this knowledge:

• Basic c
• if-else
• loop
• function
• string
• pointer
• enum

what is Palindrome?

In the most simple terms, a palindrome is a word, phrase, or number which reads the same backwards as it does when being read forwards. it does not matter if there are punctuation marks within the palindrome

these do not count and if they are present, the sequence or word will still fall under the category of the palindrome.

the word palindrome originally comes from the greek language and is made up of two words, the first being palin which translates to mean again and the second being dromos which translates to mean direction or way.

the palindrome, when read backwards will have the same pattern, layout, appearance, sound, and meaning. For the use of the palindrome in the English language, we can thank a man named Ben jonson who introduced the idea way back in the 17th century.

Palindrome example:

    
	stats, madam, wow, 
    level, refer
    191 225522
    222 9955599

source code: palindrome program in c

#include <stdio.h> #include <string.h> char *Reverse(char *); enum String oracle(char*, char* ); enum String { not_palindrome, palindrome }; int main() { enum String s1; char Rstring[20], Ustring[20], Nstring[20]; printf("\t\t\tString palindrome Program"); printf("\nEnter your String: "); gets(Ustring); strcpy(Nstring, Ustring); strcpy(Rstring, Reverse(Ustring)); s1 = oracle(Nstring, Rstring); if (s1 == 1) printf("palindrome:%s", Rstring); else printf("Not palindrome:%s ", Rstring); } enum String oracle(char Nstring[], char Rstring[]) { int orange; orange=strcmp(Nstring,Rstring); if (orange== 0) return (palindrome); else return (not_palindrome); } char *Reverse(char *code1) { int i, l; char Ancien_code; for (l = 1; *(code1 + l); l++); for (i = 0; i < l / 2; i++) { Ancien_code = *(code1 + i); *(code1 + i) = *(code1 + l - 1 - i); *(code1 + l - 1 - i) = Ancien_code; } return (code1); }

Output Screen

    Enter your String: computer
	Not palindrome:retupmoc 
     
    Enter your String: level
    palindrome:level
    

Program Logic

First, we will take input in an array named Ustring.

Then we will copy the string in the Nstring array with the help of strcpy function.

Will create another strcpy function. Nstring and reverse function will pass in it. We will pass Ustring in reverse function.

From here the cursor will go to the definition of the reverse function. In the argument bracket of the reverse function, we will create a pointer named code1.

Inside the reverse we will make i and l. And we will create an ancientcode variable of type char.

Then we will put a loop. The length of string will be obtained with the help of l and code1.

Put another loop And in that i will run till length/2.

Then inside the loop we will do swapping with the help of pointer. After that function will return value of code1.

now cursor will move on previous position where reverse function call was made.

The reverse function that will return the value. The same will be copied to Rstring.

We will then call the Oracle function. And will pass Nstring and Rstring in it. The cursor will go to the oracle function. Then the code of the Oracle function will be executed.

Inside the function, we will create an orange variable. we will call the strcmp function then will pass Nstring, Rstring. strcmp will return an integer value that will be assigned to a variable named Orange.

Then we will apply the if-else condition. And will check. if orange equal to 0 So the return is a palindrome variable. Otherwise, return no_palindrome variable. Then the Oracle function will return value. that value will be assigned to s1.

Here we will once again apply the if-else condition. if s1 equal to 1. So the string is a palindrome. Otherwise, there is no palindrome.

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Here's A Quick Way To Solve A Problem with #define in c

In this post, we will teach you what is #define in c and how it is work. #define in c is a very simple topic so we telling this topic.

To understand this program, you must have this knowledge:

• Basic c

what is #define in c?

a macro is an identifier defined in a #define preprocessor directive.

the #define directive defines an identifier and a character sequence a set of characters that will be substituted for the identifier each time it is encountered in the source file.

the identifier is referred to as a macro name and the replacement process as macro replacement.

as with symbolic constants, the macro identifier is replaced in the program with the replacement text before the program is compiled.

macros may be defined with or without arguments.

a macro without arguments is processed like a symbolic constant.

In a macro with arguments, the arguments are substituted in the replacement text, then the macro is expanded.

source code: program simple Interest with #define in c

#include <stdio.h> #define Intrest(p, r, t) (p * r * t) / 100 void main() { int pri, rate, time; float Si; printf("Enter pri,rate,time: "); scanf("%d%d%d", &pri, &rate, &time); printf("\nIntrest: %1.4f", Si = Intrest(pri, rate, time)); printf("\nYour simple Intrest is: %1.4f", pri + Si); return 0; }

Output Screen

    
Enter pri, rate, time : 5000 10 1

Intrest : 500.0000 
Your simple Intrest is : 5500.0000

Program Logic

We will include #define as a header file.

We just have to write #define. Then the name of the macro and the character-sequences.

We just have to take input from the user. whose macro we created. Have to pass the value in it. The macro will calculate and give the result.

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In c language output screen text color

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In this program, we are telling this. How to change the text color of the output screen.

   
   
  #include
#include
int main()
{
    int i;
    for(i=0;i<15;i++){
      SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),i);
    printf("hello world\n",i);
    }
 
}
                 

Output Screen

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