package slices

// Map consumes []T and a function that returns D
func Map[T, D any](srcItems []T, mapFunc func(T) D) []D {
	dstItems := make([]D, len(srcItems))
	for i, v := range srcItems {
		dstItems[i] = mapFunc(v)
	}
	return dstItems
}

// First returns the first of a slice
func First[T any](s []T) (item T, found bool) {
	if len(s) > 0 {
		return s[0], true
	}
	return item, false
}

// Last returns the last of a slice
func Last[T any](s []T) (item T, found bool) {
	if len(s) > 0 {
		return s[len(s)-1], true
	}
	return item, false
}

// FindFirst finds the first matching item in s given fn
func FindFirst[T any](s []T, fn func(T) bool) (item T, found bool) {
	for _, v := range s {
		if fn(v) {
			return v, true
		}
	}
	return item, false
}