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JustinSDK/Map.go

Created March 24, 2022 03:09
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Go 泛型：Map 實現
Raw
Map.go
package main
import "fmt"
func Map[T any](arr []T, fn func(T) T) []T {
newArr := make([]T, len(arr))
for i := 0; i < len(arr); i++ {
newArr[i] = fn(arr[i])
}
return newArr
}
func main() {
arr := []int{1, 2, 3, 4, 5}
arr2 := Map(arr, func(x int) int { return x * 2 })
fmt.Println(arr2) // [2 4 6 8 10]
}
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