In order to perform batch updates on map values in Go, you can iterate over the map and update each value using a loop or by using goroutines for concurrent updates. Here's an example of how you can achieve this:
package main
import (
"fmt"
"sync"
)
func updateMapValues(m map[string]int, newValue int) {
var wg sync.WaitGroup
wg.Add(len(m))
for key := range m {
go func(k string) {
defer wg.Done()
m[k] = newValue
}(key)
}
wg.Wait()
}
func main() {
myMap := map[string]int{
"key1": 10,
"key2": 20,
"key3": 30,
}
fmt.Println("Before batch update:", myMap)
// Perform batch update
updateMapValues(myMap, 50)
fmt.Println("After batch update:", myMap)
}
In this example, we create a updateMapValues
function that takes the map and the new value as input. We use a sync.WaitGroup to ensure that all goroutines have finished updating the map before moving forward. Inside the loop, we launch a goroutine for each key in the map and update the value to the new value.
Remember that maps are not safe for concurrent access and modification, so it's important to use synchronization mechanisms like sync.WaitGroup or sync.Mutex to ensure safe concurrent updates.