Go make和new初始化
make
make方法可以初始化slice，map，chan。返回的是引用类型。
- 初始化slice
package main
import "fmt"
mSlice := make([]int, 3)
for i := 0; i < len(mSlice); i++ {
mSlice[i] = i
}
fmt.Println(mSlice)
输出的是
[0 1 2]
- 初始化map
package main
import "fmt"
mMap := make(map[string]int)
mMap["age"] := 10
fmt.Println(mMap)
输出的是
map[age:10]
- 初始化chan
package main
import "fmt"
mChan := make(chan int ,5)
for i := 0; i < 5; i++ {
mChan <-i
}
close(mChan)
for ch:=range mChan {
fmt.Printf("chann is %v, len is %v \n", ch, len(mChan))
}
输出的是
chann is 0, len is 4
chann is 1, len is 3
chann is 2, len is 2
chann is 3, len is 1
chann is 4, len is 0
new
new方法可以初始化array，map，struct。返回的是返回传入类型的指针地址。并且new会把内存置零。
初始化数组
初始化map
初始化struct