Programacion funcional - transform (map)

main.go

package main

import (
	"fmt"
	"math"
	"strconv"
	"strings"
	
	"golang.org/x/text/cases"
	"golang.org/x/text/language"
)

func transform[T, U any](data []T, f func(T) U) []U {

	res := make([]U, 0, len(data))

	for _, e := range data {
		res = append(res, f(e))
	}

	return res
}

func main() {
	languages := []string{"go", "java", "php", "perl", "coldfusion"}

	fmt.Println("Lenguajes: ", languages)

	languagesUpper := transform(languages, strings.ToUpper)

	fmt.Println("Lenguajes en mayusculas: ", languagesUpper)

	languagesCapitalize := transform(languages, cases.Title(language.English).String)

	fmt.Println("Lenguajes en capitalizados: ", languagesCapitalize)

	numbers := []float64{1.5, 25.6, 3.3, 4.5, 5.4, 6.0, 7.33, 8.33, 9.98, 10.12}

	fmt.Println("Numeros: ", numbers)

	squares := transform(numbers, math.Sqrt)

	fmt.Println("Numeros al cuadrado: ", squares)

	intNumber := transform(numbers, func(n float64) int {
		return int(n)
	})

	fmt.Println("Numeros enteros: ", intNumber)

	as_strings := transform(intNumber, strconv.Itoa)

	fmt.Println("Numeros enteros como cadenas: ", as_strings)
}