/
arrays.go
54 lines (51 loc) · 1.67 KB
/
arrays.go
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package main
import (
"fmt"
"sort"
)
func main() {
// init array, declare array, initial array, initial two Dimensional array, multi-line initial array
// set array, get array, len of array , comparison array, append, sort, iteration array for range
// Declare and initialize
var a1 [3]int
fmt.Println("this is a1: ", a1)
// Declare twoD array
var a2 [2][2]int
fmt.Println("this is a2: ", a2)
// Declare and initial value, longhand var a1 [n]T = [n]T{V1,V2,...,Vn} , shorthand: a1 =: [n]T{V1, V2}
a3 := []string{"cc", "dd"}
fmt.Println("this is a3:", a3)
// Declare
var a4 []string //declare array
fmt.Printf("this is a4: %v , len : %v , cap: %v \n", a4, len(a4), cap(a4))
a5 := [...]string{"a3", "bbb"}
fmt.Printf("this is a5: %v , len : %v , cap: %v \n", a5, len(a5), cap(a5))
a6 := [][]string{{"a1", "a2"}, {"b1", "b2"}}
fmt.Printf("this is a6: %v , len : %v , cap: %v \n", a6, len(a6), cap(a6))
// value assignment
a1[0] = 2
a2[0][0] = 2
// Append
a3 = append(a3, "a1")
// Sort
sort.Strings(a3)
// Copy
copy(a4, a3)
// Iterate with range
for i, a := range a3 {
fmt.Printf("Iterate with range: index: %d, value: %v \n", i, a)
}
// Iterate with traditional style
for i := 0; i < len(a3); i++ {
fmt.Printf("Iterate with traditional style: index: %d, value: %v \n", i, a3[i])
}
// -----------------------------
// Contiguous memory allocations
// -----------------------------
// Declare an array of 6 strings initialized with values.
a7 := [6]string{"Annie", "Betty", "Charley", "Doug", "Edward", "Hoanh"}
fmt.Printf("\n=> Contiguous memory allocations\n")
for i, v := range a7 {
fmt.Printf("Value[%s]\tAddress[%p] IndexAddr[%p]\n", v, &v, &a7[i])
}
}