Maps पर Iteration करना

// Every Go file belongs to a package; main builds an executable
package main

// Import the fmt package
import "fmt"

// main is where the program starts running
func main() {
	// Short declaration: create fruitCounts and infer the type
	fruitCounts := map[string]int{"apple": 3, "banana": 5}
	// Short declaration: create total and infer the type
	total := 0
	// Loop over fruitCounts; the blank identifier _ ignores the index
	for _, count := range fruitCounts {
		total += count
	}
	// Print the values followed by a newline
	fmt.Println("total fruit:", total)
}

Login to try C/C++/Java/PHP code in the editor

// Every Go file belongs to a package; main builds an executable
package main

// Import the fmt package
import "fmt"

// main is where the program starts running
func main() {
	// Short declaration: create m and infer the type
	m := map[int]string{1: "a", 2: "b", 3: "c"}
	// Short declaration: create count and infer the type
	count := 0
	for k := range m {
		count++
		_ = k
	}
	// Print the values followed by a newline
	fmt.Println("visited", count, "entries (order varies each run)")
}

Login to try C/C++/Java/PHP code in the editor

// Every Go file belongs to a package; main builds an executable
package main

// Import the packages this program uses
import (
	"fmt"
	"sort"
)

// main is where the program starts running
func main() {
	// Short declaration: create scores and infer the type
	scores := map[string]int{"charlie": 3, "alice": 1, "bob": 2}
	// Short declaration: create keys and infer the type
	keys := make([]string, 0, len(scores))
	for k := range scores {
		// append adds elements and returns the updated slice
		keys = append(keys, k)
	}
	sort.Strings(keys)
	// Loop over keys; the blank identifier _ ignores the index
	for _, k := range keys {
		// Print the values followed by a newline
		fmt.Println(k, scores[k])
	}
}

Login to try C/C++/Java/PHP code in the editor