The errors.As function in Go is used to find and extract an error of a specific type from a chain of wrapped errors. This function is part of the errors package and is particularly useful when you need to access specific information or methods provided by a custom error type. Syntax func As(err error, target …
The errors.Is function in Go is used to determine whether a specific error is present in a chain of wrapped errors. This function is part of the errors package and is particularly useful when you need to check if an error is equivalent to a specific target error, even if the error has been wrapped …
The errors.New function in Go is used to create a new error with a specified message. This function is part of the errors package and is typically used to generate simple error messages in Go programs. Syntax func New(text string) error Parameters: text: A string that represents the error message. Returns: error: Returns an error …
The strings.Index function in Go is used to find the first occurrence of a substring within a string. It returns the index of the first character of the substring if it is found; otherwise, it returns -1. This function is part of the strings package and is useful for searching and locating substrings within a …
The strings.HasPrefix function in Go is used to check whether a given string starts with a specified prefix. This function is part of the strings package and is particularly useful when you need to validate if a string begins with a particular substring, such as a URL scheme, file path, or other common patterns. Syntax …
The strings.HasSuffix function in Golang is part of the strings package and is used to check whether a string ends with a specified suffix. This function is particularly useful when you need to verify if a string conforms to a certain pattern or ends with a particular substring.
Introduction Java 8 brought significant improvements and new features to the Java programming language. These features are designed to improve developer productivity, enable functional programming, and enhance performance. This cheat sheet covers the most important concepts and features introduced in Java 8. Learn everything about Java and Java 8: Learn Java Programming. Java 8 Concepts …
Introduction RabbitMQ is an open-source message broker software that facilitates communication between different parts of a system by sending, receiving, and managing messages. It’s commonly used in distributed systems to ensure reliable data transfer between services. This cheat sheet covers the key concepts and commands you need to work efficiently with RabbitMQ. RabbitMQ Concepts Concept …
Introduction Apache Kafka is a distributed streaming platform used to build real-time data pipelines and streaming applications. It is designed to handle a high throughput of data streams, providing features like fault tolerance, scalability, and durability. Kafka is widely used in industries for real-time analytics, monitoring, and event-driven architectures. This cheat sheet provides a quick …
Introduction TestNG is a powerful testing framework inspired by JUnit and NUnit. It is designed to cover all categories of tests, including unit, functional, end-to-end, integration, etc. TestNG offers various annotations that help to configure and execute test methods in a flexible manner. This cheat sheet provides a comprehensive list of TestNG annotations along with …
The reflect.StructOf function in Golang is part of the reflect package and is used to create a new struct type dynamically based on a set of fields. This function is particularly useful when you need to define struct types at runtime, such as in scenarios where the structure of data is not known until the …
The reflect.SliceOf function in Golang is part of the reflect package and is used to create a new slice type dynamically based on a specified element type. This function is particularly useful when you need to work with slices where the type of the elements is determined at runtime, allowing for greater flexibility in dynamic …
The reflect.PtrTo function in Golang is part of the reflect package and is used to obtain the pointer type to a given type. This function is particularly useful when you need to work with pointers dynamically, such as when you need to create or manipulate pointers to types that are only determined at runtime.
The reflect.MapOf function in Golang is part of the reflect package and is used to create a new map type dynamically based on specified key and element types. This function is particularly useful when you need to work with maps where the types of keys and values are determined at runtime, allowing for greater flexibility …
The reflect.InterfaceOf function in Golang is part of the reflect package and is used to create a new interface type dynamically based on a slice of method definitions. This function is particularly useful when you need to define interfaces at runtime or when working with dynamic types where the interface might not be known until …
The reflect.ChanOf function in Golang is part of the reflect package and is used to create a new channel type with a specified element type and direction (send, receive, or both). This function is particularly useful when you need to work with channels where the type or direction is determined dynamically during the execution of …
The reflect.ArrayOf function in Golang is part of the reflect package and is used to create a new array type of a specified length and element type at runtime. This function is particularly useful when you need to work with arrays where the type or length is determined dynamically during the execution of your program.
The reflect.DeepEqual function in Golang is part of the reflect package and is used to determine whether two values are deeply equal. Deep equality means that not only the values themselves but also all their elements (if they are composite types like arrays, slices, maps, or structs) are equal. This function is particularly useful when …
The reflect.Indirect function in Golang is part of the reflect package and is used to retrieve the value that a pointer refers to, or return the value itself if it is not a pointer. This function is particularly useful when dealing with values that may or may not be pointers and you need to work …
The reflect.MakeFunc function in Golang is part of the reflect package and is used to create a new function value with a given type and implementation at runtime. This function is particularly useful when you need to generate functions dynamically, for example, in cases where the behavior or signature of the function is not known …
The reflect.MakeChan function in Golang is part of the reflect package and is used to create a new channel of a specified type and buffer size at runtime. This function is particularly useful when you need to dynamically create channels with types and capacities that are determined during execution, making it used in scenarios where …
The reflect.MakeMap function in Golang is part of the reflect package and is used to create a new, empty map of a specified type at runtime. This function is particularly useful when you need to dynamically create maps with types that are determined at runtime, such as in generic functions or when working with data …
The reflect.MakeSlice function in Golang is part of the reflect package and is used to create a new slice of a specific type, length, and capacity at runtime. This function is particularly useful when you need to dynamically create slices in situations where the type, length, or capacity is determined during the execution of the …
The reflect.New function in Golang is part of the reflect package and is used to create a new, zero-initialized instance of a given type. It returns a reflect.Value that holds a pointer to a new instance of the specified type. This is particularly useful when you need to dynamically allocate memory for a type at …
The reflect.Zero function in Golang is part of the reflect package and is used to obtain the zero value for a specific type. The zero value is the default value that a variable of a given type would have if it were declared without an explicit initial value. This is particularly useful in scenarios where …