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Add FromSlicePtr #442

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Add FromSlicePtr #442

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10 changes: 10 additions & 0 deletions type_manipulation.go
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Expand Up @@ -43,6 +43,16 @@ func FromPtrOr[T any](x *T, fallback T) T {
return *x
}

// FromSlicePtr returns a slice of value filtering any nil pointers.
func FromSlicePtr[T any](collection []*T) []T {
return FilterMap(collection, func(item *T, _ int) (T, bool) {
if item == nil {
return Empty[T](), false
}
return *item, true
})
}

// ToSlicePtr returns a slice of pointer copy of value.
func ToSlicePtr[T any](collection []T) []*T {
return Map(collection, func(x T, _ int) *T {
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11 changes: 11 additions & 0 deletions type_manipulation_test.go
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Expand Up @@ -89,6 +89,17 @@ func TestFromPtrOr(t *testing.T) {
is.Equal(fallbackInt, FromPtrOr(nil, fallbackInt))
}

func TestFromSlicePtr(t *testing.T) {
t.Parallel()
is := assert.New(t)

str1 := "foo"
str2 := "bar"
result1 := FromSlicePtr([]*string{&str1, nil, &str2})

is.Equal(result1, []string{str1, str2})
}

func TestToSlicePtr(t *testing.T) {
t.Parallel()
is := assert.New(t)
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