Go map type

This is a created article in which the information may have evolved or changed.

map structure, personal feel can and PHP is a kind of array, is a key-value hash structure. In go, key can be a type other than the Func,array,slice,map type

Simple to use:

 m:=map[string]string{} m["key1"]="val1"

The map structure and slice are the same, and are a pointer. When assigning a value, copy the pointer to the new variable

Map additions and deletions to check the operation:

package  mainimport "fmt"func main(){   m:=map[string]string{"key1":"value"}   fmt.Println(m)   m["key2"]="value2"   fmt.Println(m)   p:=m["key1"]   fmt.Println(p)   delete(m,"key1")   fmt.Println(m)}

New and make differences

New (T) can be used to create a normal type, returning a pointer to the initialized T value.
Make (S) can only be used to create slice,map,channel. Returns an initialized s value (equivalent to a pointer).