lo/docs/data/core-map.md

name, slug, sourceRef, category, subCategory, playUrl, similarHelpers, variantHelpers, position, signatures

name	slug	sourceRef	category	subCategory	playUrl	similarHelpers	variantHelpers	position	signatures
Map	map	slice.go#L26	core	slice	https://go.dev/play/p/OkPcYAhBo0D	core#slice#maperr core#slice#filtermap core#slice#flatmap core#slice#uniqmap core#slice#rejectmap core#slice#mapkeys core#slice#mapvalues core#slice#mapentries core#slice#maptoslice core#slice#filtermaptoslice parallel#slice#map mutable#slice#map	core#slice#map	10	func Map[T any, R any](collection []T, transform func(item T, index int) R) []R

Transforms each element in a slice to a new type using a function. Takes both the element and its index, making it useful for transformations that need positional context.

// Basic type transformation
transformed := lo.Map([]int64{1, 2, 3, 4}, func(x int64, index int) string {
    return strconv.FormatInt(x, 10)
})
// transformed: []string{"1", "2", "3", "4"}

// Transforming structs
type Person struct {
    FirstName string
    LastName  string
    Age       int
}

people := []Person{
    {FirstName: "John", LastName: "Doe", Age: 25},
    {FirstName: "Jane", LastName: "Smith", Age: 30},
}

fullNames := lo.Map(people, func(p Person, index int) string {
    return fmt.Sprintf("%s %s", p.FirstName, p.LastName)
})
// fullNames: []string{"John Doe", "Jane Smith"}