43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
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package slices
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import (
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"container/list"
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)
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// Deref returns a slice containing all dereferenced values of s.
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// The returned slice will be a dereferenced and continuous block of memory.
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// Nil pointers are ignored.
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func Deref[T any](s []*T) []T {
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out := make([]T, 0, len(s))
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Each(s, func(v *T) {
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if v != nil {
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out = append(out, *v)
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}
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})
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return out
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}
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// ToList returns a list.List containing all values of s
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func ToList[T any](s []T) *list.List {
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l := list.New()
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Each(s, func(value T) { l.PushBack(value) })
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return l
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}
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// ToMap returns a map containing all values of s.
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// The map key-value pairs are determined by mapper
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func ToMap[T any, K comparable, V any](s []T, mapper func(T) (K, V)) map[K]V {
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m := map[K]V{}
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Each(s, func(value T) {
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k, v := mapper(value)
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m[k] = v
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})
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return m
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}
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// ToStructMap returns a struct{} map containing all values of s as keys.
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// It is a shorthand for ToMap(s, func(value T) (T, struct{}) { return value, struct{}{} })
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func ToStructMap[T comparable](s []T) map[T]struct{} {
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return ToMap(s, func(value T) (T, struct{}) { return value, struct{}{} })
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}
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