When declaring variables in Go, we usually have two syntax options: In some scenarios, pointers; in others, reference; sometimes, either. It’s great to have choices, but it is also confusing sometimes as to which one in which scenario.To be more reasonable in choice-making, I started from pointers, walked through their natures, and summarized some rules in using them in Go.from unsplash, Jordan LadikosPointersGo has pointers. A pointer holds the memory address of a value.— from A Tour of GoThe data is stored in the memory when the program runs and each has a num...

Go is a language with the pointer type, by which we canPass pointer into a function and update value in-place.Add methods to a struct as (* T) A, which is different from (T) A().However, the pointer is type-safe in Go, meaning that there are such restrictions of the pointer.Different types of pointers are unconvertible.Pointer type cannot be used for calculation.Pointer types cannot be compared, either == nor !=.No mutual assignment between different pointer-type variables.For example, *int cannot be converted to *int32in the following code.func main() {...

GoLang provides two major ways to loop through elements of array, slice and map. They are for and for range. Many people find that for range is very convenient when don't care about the index of the element. In this post, some tricks and tips would be talked about regarding for range.1. Loop and get pointer of each elementAssume there is a code snippet like below which is to get the pointer of each element in an array and create a new array with the corresponding pointer.arr := [2]int{1, 2}res := []*int{}for _, v := range arr { res = append(res, &v)}//expect: 1 2fmt.Println(*res[0],*res...