Learning notes , Where is where .

Comparing to conventional , and Java similar .

The sample code is as follows

package main

import "fmt"

func array1() {
	var a = [5]int{1, 2, 3}
	for i, c := range a {
		fmt.Printf("%d - %d\n", i, c)
	}
	fmt.Printf("%v\n", a)
	var b = [...]float64{1.0, 2.3, 1.9}
	fmt.Printf("%v - %.2f length=%d\n", b, b[0], len(b))

	students := [][]string{}
	boys := []string{" Xiao Wang ", " petty thief ", " Xiao Zhang "}
	girls := []string{" Xiaomei ", " Small circle ", " floret "}
	students = append(students, boys)
	students = append(students, girls)
	for i, student := range students {
		fmt.Printf("row=%d,stu=%v\n", i, student)
		for j, d := range student {
			fmt.Printf("row=%d,id=%d,name=%v\n", i, j, d)
		}
	}
}

func main() {
	array1()
}

Execution results

0 - 1
1 - 2                      
2 - 3                      
3 - 0                      
4 - 0                      
[1 2 3 0 0]                
[1 2.3 1.9] - 1.00 length=3
row=0,stu=[ Xiao Wang petty thief Xiao Zhang ] 
row=0,id=0,name= Xiao Wang       
row=0,id=1,name= petty thief       
row=0,id=2,name= Xiao Zhang       
row=1,stu=[ Xiaomei Small circle floret ] 
row=1,id=0,name= Xiaomei       
row=1,id=1,name= Small circle       
row=1,id=2,name= floret    

Be careful

1、 If the array length is uncertain , have access to "..." Instead of array length , A special , The compiler will infer {} Inner length .

2、 You can use the built-in len()、cap() Method to get the length of the array , And the maximum capacity .

3、 Multidimensional arrays can use append() Method to add a one-dimensional array to a multi-dimensional array .

Summary

Looking back at the slices , Review the array .