๐ก๐# ๐ง๐ถ๐ฝ
โ๏ธ๐จ๐๐ฒ ๐ป๐ฎ๐บ๐ฒ๐ผ๐ณ() ๐๐ผ ๐ฐ๐ผ๐ป๐๐ฒ๐ฟ๐ ๐ฎ๐ป ๐ฒ๐ป๐๐บ ๐๐ผ ๐ฎ ๐๐๐ฟ๐ถ๐ป๐ด
โ The ๐ง๐ผ๐ฆ๐๐ฟ๐ถ๐ป๐ด method, inherited from the System.Object class, is used to convert a value into its string representation. It can be overridden in derived classes to provide a meaningful string representation of the object's current state.
โ The ๐ป๐ฎ๐บ๐ฒ๐ผ๐ณ keyword, introduced in C# 6.0, is used to get the name of a variable, type, or member as a string at compile-time. It's useful to avoid magic strings in your code and to keep your code refactor-friendly.
๐ ๐ป๐ฎ๐บ๐ฒ๐ผ๐ณ() is the preferred way to convert an enum to a string. This is because nameof() is evaluated at compile time and will inject a string literal that will never change, while ToString() is evaluated at runtime. This means that nameof() is more efficient and can help to improve the performance of your code.
๐ก Using nameof() with enums can lead to mismatched enum member names if the enum changes without recompiling referencing projects, as nameof() provides names at compile-time.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ๐จ๐๐ฒ ๐ป๐ฎ๐บ๐ฒ๐ผ๐ณ() ๐๐ผ ๐ฐ๐ผ๐ป๐๐ฒ๐ฟ๐ ๐ฎ๐ป ๐ฒ๐ป๐๐บ ๐๐ผ ๐ฎ ๐๐๐ฟ๐ถ๐ป๐ด
โ The ๐ง๐ผ๐ฆ๐๐ฟ๐ถ๐ป๐ด method, inherited from the System.Object class, is used to convert a value into its string representation. It can be overridden in derived classes to provide a meaningful string representation of the object's current state.
โ The ๐ป๐ฎ๐บ๐ฒ๐ผ๐ณ keyword, introduced in C# 6.0, is used to get the name of a variable, type, or member as a string at compile-time. It's useful to avoid magic strings in your code and to keep your code refactor-friendly.
๐ ๐ป๐ฎ๐บ๐ฒ๐ผ๐ณ() is the preferred way to convert an enum to a string. This is because nameof() is evaluated at compile time and will inject a string literal that will never change, while ToString() is evaluated at runtime. This means that nameof() is more efficient and can help to improve the performance of your code.
๐ก Using nameof() with enums can lead to mismatched enum member names if the enum changes without recompiling referencing projects, as nameof() provides names at compile-time.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โค1
โ๏ธ ๐๐ฒ๐ฐ๐น๐ฎ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ฃ๐ฎ๐๐๐ฒ๐ฟ๐ป
โ You use declaration and type patterns to check if the run-time type of an expression is compatible with a given type. With a ๐ฑ๐ฒ๐ฐ๐น๐ฎ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ฝ๐ฎ๐๐๐ฒ๐ฟ๐ป, you can also declare a new local variable. When a declaration pattern matches an expression, that variable is assigned a converted expression result.
๐ฅ ๐๐ฑ๐๐ฎ๐ป๐๐ฎ๐ด๐ฒ๐ ๐ผ๐ณ ๐๐๐ถ๐ป๐ด ๐ฑ๐ฒ๐ฐ๐น๐ฎ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ฝ๐ฎ๐๐๐ฒ๐ฟ๐ป๐:
โพ๏ธ They can make your code more readable and maintainable.
โพ๏ธ They can help you to avoid errors caused by type mismatches.
โพ๏ธ They can be used to write more concise and expressive code.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ You use declaration and type patterns to check if the run-time type of an expression is compatible with a given type. With a ๐ฑ๐ฒ๐ฐ๐น๐ฎ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ฝ๐ฎ๐๐๐ฒ๐ฟ๐ป, you can also declare a new local variable. When a declaration pattern matches an expression, that variable is assigned a converted expression result.
๐ฅ ๐๐ฑ๐๐ฎ๐ป๐๐ฎ๐ด๐ฒ๐ ๐ผ๐ณ ๐๐๐ถ๐ป๐ด ๐ฑ๐ฒ๐ฐ๐น๐ฎ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ฝ๐ฎ๐๐๐ฒ๐ฟ๐ป๐:
โพ๏ธ They can make your code more readable and maintainable.
โพ๏ธ They can help you to avoid errors caused by type mismatches.
โพ๏ธ They can be used to write more concise and expressive code.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โค1
โ๏ธ ๐จ๐๐ฒ ๐๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ ๐ถ๐ป๐๐๐ฒ๐ฎ๐ฑ ๐ผ๐ณ ๐ง๐ผ๐จ๐ฝ๐ฝ๐ฒ๐ฟ()/๐ง๐ผ๐๐ผ๐๐ฒ๐ฟ() ๐๐ต๐ฒ๐ป ๐ฐ๐ผ๐บ๐ฝ๐ฎ๐ฟ๐ถ๐ป๐ด ๐๐๐ฟ๐ถ๐ป๐ด๐
๐ Using ๐ง๐ผ๐จ๐ฝ๐ฝ๐ฒ๐ฟ() and ๐ง๐ผ๐๐ผ๐๐ฒ๐ฟ() for case conversion in C# can impact performance due to memory allocation, string copying, and potential garbage collection, especially in situations involving large strings or frequent conversions.
๐ ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ is faster than ToUpper() or ToLower() due to direct character comparison, avoiding memory allocation, and reducing overhead for case-insensitive string comparison.
๐ฅ To perform string comparison , it's better to use the built-in comparison methods like ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ with appropriate StringComparison options, which handle case-insensitivity and cultural considerations correctly while maintaining better performance and accuracy.
๐ Using ๐ง๐ผ๐จ๐ฝ๐ฝ๐ฒ๐ฟ() and ๐ง๐ผ๐๐ผ๐๐ฒ๐ฟ() for case conversion in C# can impact performance due to memory allocation, string copying, and potential garbage collection, especially in situations involving large strings or frequent conversions.
๐ ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ is faster than ToUpper() or ToLower() due to direct character comparison, avoiding memory allocation, and reducing overhead for case-insensitive string comparison.
๐ฅ To perform string comparison , it's better to use the built-in comparison methods like ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ with appropriate StringComparison options, which handle case-insensitivity and cultural considerations correctly while maintaining better performance and accuracy.
โ๏ธ ๐ฅ๐ฒ๐ฝ๐น๐ฎ๐ฐ๐ฒ ๐ถ๐ณ ๐๐๐ฎ๐๐ฒ๐บ๐ฒ๐ป๐ ๐๐ถ๐๐ต ๐ก๐๐น๐น ๐๐ผ๐ป๐ฑ๐ถ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ข๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ
โ The ๐ป๐๐น๐น ๐ฐ๐ผ๐ป๐ฑ๐ถ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ, also known as the null propagation operator or the safe navigation operator, is a feature introduced in C# 6.0 that allows you to write cleaner and more concise code when dealing with potentially null reference types.
๐ก The ๐ป๐๐น๐น ๐ฐ๐ผ๐ป๐ฑ๐ถ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ is represented by a question mark followed by a period (?.) and is used to access members or invoke methods on an object that may be null. If the object is null, the expression returns null instead of throwing a null reference exception.
๐ฅ ๐๐ฑ๐๐ฎ๐ป๐๐ฎ๐ด๐ฒ๐ ๐ผ๐ณ ๐๐๐ถ๐ป๐ด ๐๐ต๐ฒ ๐ป๐๐น๐น ๐ฐ๐ผ๐ป๐ฑ๐ถ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ:
โพ๏ธThe null conditional operator can make your code more concise and readable.
โพ๏ธThe null conditional operator can help to avoid null-reference exceptions.
โพ๏ธThe null conditional operator can be used to chain together multiple member or element accesses, even if some of the members or elements may be null.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ The ๐ป๐๐น๐น ๐ฐ๐ผ๐ป๐ฑ๐ถ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ, also known as the null propagation operator or the safe navigation operator, is a feature introduced in C# 6.0 that allows you to write cleaner and more concise code when dealing with potentially null reference types.
๐ก The ๐ป๐๐น๐น ๐ฐ๐ผ๐ป๐ฑ๐ถ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ is represented by a question mark followed by a period (?.) and is used to access members or invoke methods on an object that may be null. If the object is null, the expression returns null instead of throwing a null reference exception.
๐ฅ ๐๐ฑ๐๐ฎ๐ป๐๐ฎ๐ด๐ฒ๐ ๐ผ๐ณ ๐๐๐ถ๐ป๐ด ๐๐ต๐ฒ ๐ป๐๐น๐น ๐ฐ๐ผ๐ป๐ฑ๐ถ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ:
โพ๏ธThe null conditional operator can make your code more concise and readable.
โพ๏ธThe null conditional operator can help to avoid null-reference exceptions.
โพ๏ธThe null conditional operator can be used to chain together multiple member or element accesses, even if some of the members or elements may be null.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โค1
โ๏ธ ๐# ๐ญ๐ฎ ๐ฃ๐ฟ๐ถ๐บ๐ฎ๐ฟ๐ ๐๐ผ๐ป๐๐๐ฟ๐๐ฐ๐๐ผ๐ฟ๐
โ ๐# ๐ญ๐ฎ introduces ๐ฝ๐ฟ๐ถ๐บ๐ฎ๐ฟ๐ ๐ฐ๐ผ๐ป๐๐๐ฟ๐๐ฐ๐๐ผ๐ฟ๐, a concise syntax to declare constructors whose parameters are available anywhere in the body of the type.
๐ง๐ต๐ฒ ๐บ๐ผ๐๐ ๐ฐ๐ผ๐บ๐บ๐ผ๐ป ๐๐๐ฒ๐ ๐ณ๐ผ๐ฟ ๐ฎ ๐ฝ๐ฟ๐ถ๐บ๐ฎ๐ฟ๐ ๐ฐ๐ผ๐ป๐๐๐ฟ๐๐ฐ๐๐ผ๐ฟ ๐ฝ๐ฎ๐ฟ๐ฎ๐บ๐ฒ๐๐ฒ๐ฟ ๐ฎ๐ฟ๐ฒ:
โพ๏ธ As an argument to a base() constructor invocation.
โพ๏ธ To initialize a member field or property.
โพ๏ธ Referencing the constructor parameter in an instance member.
๐ฅ You can use the ๐ฝ๐ฟ๐ถ๐บ๐ฎ๐ฟ๐ ๐ฐ๐ผ๐ป๐๐๐ฟ๐๐ฐ๐๐ผ๐ฟ๐ as best suits your design. For classes and structs, primary constructor parameters are parameters to a constructor that must be invoked. You can use them to initialize properties. You can initialize fields. Those properties or fields can be immutable, or mutable. You can use them in methods.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ ๐# ๐ญ๐ฎ introduces ๐ฝ๐ฟ๐ถ๐บ๐ฎ๐ฟ๐ ๐ฐ๐ผ๐ป๐๐๐ฟ๐๐ฐ๐๐ผ๐ฟ๐, a concise syntax to declare constructors whose parameters are available anywhere in the body of the type.
๐ง๐ต๐ฒ ๐บ๐ผ๐๐ ๐ฐ๐ผ๐บ๐บ๐ผ๐ป ๐๐๐ฒ๐ ๐ณ๐ผ๐ฟ ๐ฎ ๐ฝ๐ฟ๐ถ๐บ๐ฎ๐ฟ๐ ๐ฐ๐ผ๐ป๐๐๐ฟ๐๐ฐ๐๐ผ๐ฟ ๐ฝ๐ฎ๐ฟ๐ฎ๐บ๐ฒ๐๐ฒ๐ฟ ๐ฎ๐ฟ๐ฒ:
โพ๏ธ As an argument to a base() constructor invocation.
โพ๏ธ To initialize a member field or property.
โพ๏ธ Referencing the constructor parameter in an instance member.
๐ฅ You can use the ๐ฝ๐ฟ๐ถ๐บ๐ฎ๐ฟ๐ ๐ฐ๐ผ๐ป๐๐๐ฟ๐๐ฐ๐๐ผ๐ฟ๐ as best suits your design. For classes and structs, primary constructor parameters are parameters to a constructor that must be invoked. You can use them to initialize properties. You can initialize fields. Those properties or fields can be immutable, or mutable. You can use them in methods.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ ๐ฃ๐ฟ๐ฒ๐ณ๐ฒ๐ฟ ๐๐ป๐() ๐ผ๐๐ฒ๐ฟ ๐๐ผ๐๐ป๐()
โ The ๐๐ผ๐๐ป๐() method is used to get the total number of elements in a collection that satisfy a given condition. It returns an integer value representing the count of matching elements.
โ The ๐๐ป๐() method is used to quickly determine if a collection contains any elements that satisfy a given condition. It returns a boolean value (true if any element matches the condition, otherwise false).
๐ Using ๐๐ป๐() over ๐๐ผ๐๐ป๐() can be more efficient when you are only interested in determining whether any element matching a condition exists in the collection. This is because Any() stops iterating through the collection as soon as it finds the first matching element, while Count() iterates through the entire collection to count all matching elements. In cases where the collection is large, Any() can potentially provide better performance.
๐ฅ Use ๐๐ป๐() over ๐๐ผ๐๐ป๐() when you only care if there are any elements in a collection, not the exact number of elements. You should also use Any() when the collection is large or lazy-evaluated. And you should use Any() when you want to improve the readability of your code.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ The ๐๐ผ๐๐ป๐() method is used to get the total number of elements in a collection that satisfy a given condition. It returns an integer value representing the count of matching elements.
โ The ๐๐ป๐() method is used to quickly determine if a collection contains any elements that satisfy a given condition. It returns a boolean value (true if any element matches the condition, otherwise false).
๐ Using ๐๐ป๐() over ๐๐ผ๐๐ป๐() can be more efficient when you are only interested in determining whether any element matching a condition exists in the collection. This is because Any() stops iterating through the collection as soon as it finds the first matching element, while Count() iterates through the entire collection to count all matching elements. In cases where the collection is large, Any() can potentially provide better performance.
๐ฅ Use ๐๐ป๐() over ๐๐ผ๐๐ป๐() when you only care if there are any elements in a collection, not the exact number of elements. You should also use Any() when the collection is large or lazy-evaluated. And you should use Any() when you want to improve the readability of your code.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ๐ฅ๐ฒ๐น๐ฎ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ฃ๐ฎ๐๐๐ฒ๐ฟ๐ป๐ ๐ ๐ฎ๐๐ฐ๐ต๐ถ๐ป๐ด
โ ๐ฅ๐ฒ๐น๐ฎ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ฃ๐ฎ๐๐๐ฒ๐ฟ๐ป๐ ๐ ๐ฎ๐๐ฐ๐ต๐ถ๐ป๐ด is a feature introduced in ๐# ๐ต that enhances the pattern matching capabilities of the language. Pattern matching is a way to compare values against patterns.
โ It is a ๐ณ๐๐ป๐ฐ๐๐ถ๐ผ๐ป๐ฎ๐น programming technique, which means that it focuses on the evaluation of expressions rather than the control flow of your code.
๐ฅ ๐๐ฑ๐๐ฎ๐ป๐๐ฎ๐ด๐ฒ๐ ๐ผ๐ณ ๐ฟ๐ฒ๐น๐ฎ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ฝ๐ฎ๐๐๐ฒ๐ฟ๐ป๐ ๐บ๐ฎ๐๐ฐ๐ต๐ถ๐ป๐ด:
โพ๏ธ ๐๐ผ๐ป๐ฐ๐ถ๐๐ฒ๐ป๐ฒ๐๐: Relational patterns matching can be used to create more concise and readable code.
โพ๏ธ ๐๐ ๐ฝ๐ฟ๐ฒ๐๐๐ถ๐๐ฒ๐ป๐ฒ๐๐: Relational patterns matching can be used to express more complex conditions.
๐ก ๐ฅ๐ฒ๐น๐ฎ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ฃ๐ฎ๐๐๐ฒ๐ฟ๐ป๐ ๐ ๐ฎ๐๐ฐ๐ต๐ถ๐ป๐ด is not always the best solution. Sometimes, it is simpler and more efficient to use the traditional way of checking if an expression matches a certain condition.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ ๐ฅ๐ฒ๐น๐ฎ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ฃ๐ฎ๐๐๐ฒ๐ฟ๐ป๐ ๐ ๐ฎ๐๐ฐ๐ต๐ถ๐ป๐ด is a feature introduced in ๐# ๐ต that enhances the pattern matching capabilities of the language. Pattern matching is a way to compare values against patterns.
โ It is a ๐ณ๐๐ป๐ฐ๐๐ถ๐ผ๐ป๐ฎ๐น programming technique, which means that it focuses on the evaluation of expressions rather than the control flow of your code.
๐ฅ ๐๐ฑ๐๐ฎ๐ป๐๐ฎ๐ด๐ฒ๐ ๐ผ๐ณ ๐ฟ๐ฒ๐น๐ฎ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ฝ๐ฎ๐๐๐ฒ๐ฟ๐ป๐ ๐บ๐ฎ๐๐ฐ๐ต๐ถ๐ป๐ด:
โพ๏ธ ๐๐ผ๐ป๐ฐ๐ถ๐๐ฒ๐ป๐ฒ๐๐: Relational patterns matching can be used to create more concise and readable code.
โพ๏ธ ๐๐ ๐ฝ๐ฟ๐ฒ๐๐๐ถ๐๐ฒ๐ป๐ฒ๐๐: Relational patterns matching can be used to express more complex conditions.
๐ก ๐ฅ๐ฒ๐น๐ฎ๐๐ถ๐ผ๐ป๐ฎ๐น ๐ฃ๐ฎ๐๐๐ฒ๐ฟ๐ป๐ ๐ ๐ฎ๐๐ฐ๐ต๐ถ๐ป๐ด is not always the best solution. Sometimes, it is simpler and more efficient to use the traditional way of checking if an expression matches a certain condition.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ ๐๐ผ๐ป'๐ ๐๐๐ฒ ๐ ๐๐น๐๐ถ๐ฝ๐น๐ฒ ๐ข๐ฟ๐ฑ๐ฒ๐ฟ๐๐ ๐ฐ๐ฎ๐น๐น๐
โ ๏ธ The ๐ข๐ฟ๐ฑ๐ฒ๐ฟ๐๐ operator is used to sort a sequence of elements based on a specified key. When multiple OrderBy calls are chained together, each subsequent call completely reorders the list, discarding the results of the previous call. This means that only the last OrderBy call will have any effect on the final ordering of the sequence.
๐ Using multiple ๐ข๐ฟ๐ฑ๐ฒ๐ฟ๐๐ calls can also lead to performance problems. This is because each OrderBy call performs a full sort of the list, which can be expensive. If you are chaining multiple OrderBy calls together, you are essentially performing multiple full sorts, which can significantly slow down your code.
โ The ๐ง๐ต๐ฒ๐ป๐๐ method is used after the initial OrderBy to apply additional sorting conditions. This ensures that the data is sorted first by the first field (Name in this example), and then by the second field (Price in this example).
๐ The ๐ง๐ต๐ฒ๐ป๐๐ method in C# can be used to chain multiple sorting criteria together, without the performance overhead of calling OrderBy multiple times.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ ๏ธ The ๐ข๐ฟ๐ฑ๐ฒ๐ฟ๐๐ operator is used to sort a sequence of elements based on a specified key. When multiple OrderBy calls are chained together, each subsequent call completely reorders the list, discarding the results of the previous call. This means that only the last OrderBy call will have any effect on the final ordering of the sequence.
๐ Using multiple ๐ข๐ฟ๐ฑ๐ฒ๐ฟ๐๐ calls can also lead to performance problems. This is because each OrderBy call performs a full sort of the list, which can be expensive. If you are chaining multiple OrderBy calls together, you are essentially performing multiple full sorts, which can significantly slow down your code.
โ The ๐ง๐ต๐ฒ๐ป๐๐ method is used after the initial OrderBy to apply additional sorting conditions. This ensures that the data is sorted first by the first field (Name in this example), and then by the second field (Price in this example).
๐ The ๐ง๐ต๐ฒ๐ป๐๐ method in C# can be used to chain multiple sorting criteria together, without the performance overhead of calling OrderBy multiple times.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ ๐ฆ๐๐ฟ๐ถ๐ป๐ด๐ ๐๐ต๐ผ๐๐น๐ฑ ๐ป๐ผ๐ ๐ฏ๐ฒ ๐ฐ๐ผ๐ป๐ฐ๐ฎ๐๐ฒ๐ป๐ฎ๐๐ฒ๐ฑ ๐๐๐ถ๐ป๐ด '+' ๐ถ๐ป ๐ฎ ๐น๐ผ๐ผ๐ฝ
๐ Strings are immutable, which means that once a string object is created, it cannot be modified. When you concatenate strings using the '+' ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ in a loop, a new string object is created at each iteration, and the previous objects are discarded. This can lead to performance issues, especially when dealing with large strings or a large number of iterations.
๐ A more efficient approach to string concatenation in C# is to use the ๐ฆ๐๐ฟ๐ถ๐ป๐ด๐๐๐ถ๐น๐ฑ๐ฒ๐ฟ ๐ฐ๐น๐ฎ๐๐, which is designed for efficiently building strings in a loop. StringBuilder allows you to append strings without creating new objects each time, which leads to better performance.
๐ก ๐ฆ๐๐ฟ๐ถ๐ป๐ด๐๐๐ถ๐น๐ฑ๐ฒ๐ฟ is more useful when dealing with large strings or a large number of iterations and when we have an unknown amount of strings.
๐ฅ By using ๐ฆ๐๐ฟ๐ถ๐ป๐ด๐๐๐ถ๐น๐ฑ๐ฒ๐ฟ, you can significantly reduce memory allocations and improve the performance of your code when you need to concatenate strings in a loop. It is a best practice to use StringBuilder when working with dynamic string building operations.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
๐ Strings are immutable, which means that once a string object is created, it cannot be modified. When you concatenate strings using the '+' ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ in a loop, a new string object is created at each iteration, and the previous objects are discarded. This can lead to performance issues, especially when dealing with large strings or a large number of iterations.
๐ A more efficient approach to string concatenation in C# is to use the ๐ฆ๐๐ฟ๐ถ๐ป๐ด๐๐๐ถ๐น๐ฑ๐ฒ๐ฟ ๐ฐ๐น๐ฎ๐๐, which is designed for efficiently building strings in a loop. StringBuilder allows you to append strings without creating new objects each time, which leads to better performance.
๐ก ๐ฆ๐๐ฟ๐ถ๐ป๐ด๐๐๐ถ๐น๐ฑ๐ฒ๐ฟ is more useful when dealing with large strings or a large number of iterations and when we have an unknown amount of strings.
๐ฅ By using ๐ฆ๐๐ฟ๐ถ๐ป๐ด๐๐๐ถ๐น๐ฑ๐ฒ๐ฟ, you can significantly reduce memory allocations and improve the performance of your code when you need to concatenate strings in a loop. It is a best practice to use StringBuilder when working with dynamic string building operations.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ ๐ก๐๐น๐น ๐ฐ๐ต๐ฒ๐ฐ๐ธ๐ ๐๐ต๐ผ๐๐น๐ฑ ๐ป๐ผ๐ ๐ฏ๐ฒ ๐๐๐ฒ๐ฑ ๐๐ถ๐๐ต ๐ถ๐
โ In C#, the ๐ถ๐ ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ is used to determine whether an object is compatible with a specific type. It evaluates to true if the object can be cast to the specified type without causing an exception, and false otherwise. It also returns false for null objects.
โ The ๐ถ๐ ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ can be useful in the following scenarios:
โพ๏ธ To check the run-time type of an expression.
โพ๏ธ To check for null.
โพ๏ธ To check for non-null using a negation pattern.
โพ๏ธ Match elements of a list or array using list patterns.
๐ก ๐ก๐๐น๐น ๐ฐ๐ต๐ฒ๐ฐ๐ธ๐ ๐๐ต๐ผ๐๐น๐ฑ ๐ป๐ผ๐ ๐ฏ๐ฒ ๐๐๐ฒ๐ฑ ๐๐ถ๐๐ต ๐ถ๐
Thereโs no need to null test in conjunction with an is test. null is not an instance of anything, so a null check is redundant.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ In C#, the ๐ถ๐ ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ is used to determine whether an object is compatible with a specific type. It evaluates to true if the object can be cast to the specified type without causing an exception, and false otherwise. It also returns false for null objects.
โ The ๐ถ๐ ๐ผ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ can be useful in the following scenarios:
โพ๏ธ To check the run-time type of an expression.
โพ๏ธ To check for null.
โพ๏ธ To check for non-null using a negation pattern.
โพ๏ธ Match elements of a list or array using list patterns.
๐ก ๐ก๐๐น๐น ๐ฐ๐ต๐ฒ๐ฐ๐ธ๐ ๐๐ต๐ผ๐๐น๐ฑ ๐ป๐ผ๐ ๐ฏ๐ฒ ๐๐๐ฒ๐ฑ ๐๐ถ๐๐ต ๐ถ๐
Thereโs no need to null test in conjunction with an is test. null is not an instance of anything, so a null check is redundant.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ ๐ฃ๐ฟ๐ฒ๐ณ๐ฒ๐ฟ ๐๐ต๐ฒ ๐ถ๐ ๐๐ฒ๐๐๐ผ๐ฟ๐ฑ ๐ข๐๐ฒ๐ฟ ๐๐ต๐ฒ == ๐ข๐ฝ๐ฒ๐ฟ๐ฎ๐๐ผ๐ฟ ๐๐ผ ๐ฐ๐ต๐ฒ๐ฐ๐ธ ๐ณ๐ผ๐ฟ ๐ป๐๐น๐น
โ The primary reason to prefer ๐ถ๐ for null checks is its avoidance of potential operator overloading issues. Operator overloading allows programmers to define custom behavior for operators like == for their classes. While useful, this feature can introduce unexpected behavior when checking for null.
๐ก Consider a scenario where a class Student overloads the == operator to compare the values of its properties rather than object references. If you use == to check for null, you might not get the expected result, as the overloaded == would compare property values instead of checking for null.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ The primary reason to prefer ๐ถ๐ for null checks is its avoidance of potential operator overloading issues. Operator overloading allows programmers to define custom behavior for operators like == for their classes. While useful, this feature can introduce unexpected behavior when checking for null.
๐ก Consider a scenario where a class Student overloads the == operator to compare the values of its properties rather than object references. If you use == to check for null, you might not get the expected result, as the overloaded == would compare property values instead of checking for null.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ ๐๐๐ป๐ฐ๐๐ถ๐ผ๐ป๐ ๐๐ต๐ผ๐๐น๐ฑ ๐ฑ๐ผ ๐ผ๐ป๐ฒ ๐๐ต๐ถ๐ป๐ด
โ This principle suggests that a function should have only one reason to change, meaning that it should perform a single, well-defined task and not multiple unrelated tasks. This approach increases readability, maintainability, and testability of your code.
โ A function that does too many things or has too many responsibilities can become difficult to understand, test, and maintain.
๐๐บ๐ฝ๐น๐ฒ๐บ๐ฒ๐ป๐๐ฎ๐๐ถ๐ผ๐ป:
โพ๏ธ Identify the single responsibility of the function. What is the one thing that the function should do?
โพ๏ธ Extract all unrelated code from the function. This code can be moved to other functions or classes.
โพ๏ธ Give the function a descriptive name that reflects its single responsibility.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ This principle suggests that a function should have only one reason to change, meaning that it should perform a single, well-defined task and not multiple unrelated tasks. This approach increases readability, maintainability, and testability of your code.
โ A function that does too many things or has too many responsibilities can become difficult to understand, test, and maintain.
๐๐บ๐ฝ๐น๐ฒ๐บ๐ฒ๐ป๐๐ฎ๐๐ถ๐ผ๐ป:
โพ๏ธ Identify the single responsibility of the function. What is the one thing that the function should do?
โพ๏ธ Extract all unrelated code from the function. This code can be moved to other functions or classes.
โพ๏ธ Give the function a descriptive name that reflects its single responsibility.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
โ๏ธ ๐จ๐๐ฒ ๐๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ ๐ถ๐ป๐๐๐ฒ๐ฎ๐ฑ ๐ผ๐ณ ๐ง๐ผ๐จ๐ฝ๐ฝ๐ฒ๐ฟ()/๐ง๐ผ๐๐ผ๐๐ฒ๐ฟ() ๐๐ต๐ฒ๐ป ๐ฐ๐ผ๐บ๐ฝ๐ฎ๐ฟ๐ถ๐ป๐ด ๐๐๐ฟ๐ถ๐ป๐ด๐
๐ Using ๐ง๐ผ๐จ๐ฝ๐ฝ๐ฒ๐ฟ() and ๐ง๐ผ๐๐ผ๐๐ฒ๐ฟ() for case conversion in C# can impact performance due to memory allocation, string copying, and potential garbage collection, especially in situations involving large strings or frequent conversions.
๐ ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ is faster than ToUpper() or ToLower() due to direct character comparison, avoiding memory allocation, and reducing overhead for case-insensitive string comparison.
๐ฅ To perform string comparison , it's better to use the built-in comparison methods like ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ with appropriate StringComparison options, which handle case-insensitivity and cultural considerations correctly while maintaining better performance and accuracy.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
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๐ Using ๐ง๐ผ๐จ๐ฝ๐ฝ๐ฒ๐ฟ() and ๐ง๐ผ๐๐ผ๐๐ฒ๐ฟ() for case conversion in C# can impact performance due to memory allocation, string copying, and potential garbage collection, especially in situations involving large strings or frequent conversions.
๐ ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ is faster than ToUpper() or ToLower() due to direct character comparison, avoiding memory allocation, and reducing overhead for case-insensitive string comparison.
๐ฅ To perform string comparison , it's better to use the built-in comparison methods like ๐ฆ๐๐ฟ๐ถ๐ป๐ด.๐๐พ๐๐ฎ๐น๐ with appropriate StringComparison options, which handle case-insensitivity and cultural considerations correctly while maintaining better performance and accuracy.
๐ง๐ต๐ฎ๐ป๐ธ ๐๐ผ๐ ๐ณ๐ผ๐ฟ ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐
#csharp #dotnet #programming #cleancode
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