Programmer Think

Summary Firstly, the project overview is synchronized: Last article shared, routing Middleware - logging, this article we share: routing Middleware - catch exceptions. When the system is abnormal, prompt "system abnormal, please contact the administrator!" At the same time, panic alert mail is sent. What is an exception? The excepti ...

Summary Goang's official package management has been supported since version 1.11. Several attempts have been made before, but the results are not satisfactory, and dep has been used to manage the package. With the release of version 1.13 recently and the increasing number of official management methods using go module, dep has not been develop ...

A finalizer is a function associated with an object, set by runtime.SetFinalizer, that is called when the object is GC to complete the last step in the object's life.The existence of finalizer makes it impossible for an object to be marked as white in a trichrome marker, i.e. garbage, so that the life of the object can continue for a GC cycle.J ...

Defer is also a special key word in Go, which is mainly used to ensure that in the process of program execution, the function behind defer will be executed, generally used to close the connection, clean up resources and so on. 1. Overview of structure 1.1. defer type _defer struct { siz int32 // Size of parameters started bool // ...

brief introduction Go will finally have its own modules. Previously, only packages were available, and modules were the parent of packages. Below is a summary of the two articles you read on the official website. https://blog.golang.org/using... https://blog.golang.org/migra... Using the Go module A module is a collection of Go packages store ...

[GO Development Series - Foundation] Introduction to Go Foundation The Characteristics of Golang Language The Go language not only has the security and performance of static compiler language, but also has the high efficiency of dynamic languag ...

The first part of the Go tutorial series Notebook Interface Part 2 of the Go tutorial series Notebook Interface Go tutorial series notes concurrent introduction Go tutorial series notes goroutine Go tutorial series notes Channel channel Go Tutorial Series Note Buffer Channel and Work Pool Go Tutorial Series Notes Select Go tutorial series note ...

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Questions: Known convertible change types are 1 yuan, 5 yuan, 10 yuan, 20 yuan 4 kinds, now there are 100 yuan to change into change and the total amount is less than 15 pieces, how many kinds of exchange? What are the differences? Ideas: Known as a n optional data set S, such as [1, 5, 10, 20], we now need to extract n numbers from it, the te ...

Today let's talk about how Go uses set. This article will cover set and bitset data structures. The Data Structure of Go There are not many built-in data structures in Go. In our work, the two most commonly used data structures are slice and map, namely slicing and mapping. In fact, there are arrays in Go. The bottom of slices is arrays, but be ...