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89 lines
1.7 KiB
Go
89 lines
1.7 KiB
Go
package lo
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// ToPtr returns a pointer copy of value.
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func ToPtr[T any](x T) *T {
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return &x
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}
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// FromPtr returns the pointer value or empty.
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func FromPtr[T any](x *T) T {
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if x == nil {
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return Empty[T]()
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}
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return *x
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}
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// FromPtrOr returns the pointer value or the fallback value.
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func FromPtrOr[T any](x *T, fallback T) T {
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if x == nil {
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return fallback
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}
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return *x
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}
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// ToSlicePtr returns a slice of pointer copy of value.
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func ToSlicePtr[T any](collection []T) []*T {
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return Map(collection, func(x T, _ int) *T {
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return &x
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})
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}
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// ToAnySlice returns a slice with all elements mapped to `any` type
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func ToAnySlice[T any](collection []T) []any {
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result := make([]any, len(collection))
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for i, item := range collection {
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result[i] = item
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}
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return result
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}
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// FromAnySlice returns an `any` slice with all elements mapped to a type.
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// Returns false in case of type conversion failure.
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func FromAnySlice[T any](in []any) (out []T, ok bool) {
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defer func() {
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if r := recover(); r != nil {
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out = []T{}
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ok = false
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}
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}()
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result := make([]T, len(in))
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for i, item := range in {
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result[i] = item.(T)
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}
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return result, true
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}
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// Empty returns an empty value.
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func Empty[T any]() T {
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var zero T
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return zero
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}
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// IsEmpty returns true if argument is a zero value.
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func IsEmpty[T comparable](v T) bool {
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var zero T
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return zero == v
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}
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// IsNotEmpty returns true if argument is not a zero value.
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func IsNotEmpty[T comparable](v T) bool {
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var zero T
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return zero != v
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}
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// Coalesce returns the first non-empty arguments. Arguments must be comparable.
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func Coalesce[T comparable](v ...T) (result T, ok bool) {
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for _, e := range v {
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if e != result {
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result = e
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ok = true
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return
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}
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}
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return
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}
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