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sequenceequal.go
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sequenceequal.go
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package go2linq
import (
"iter"
"github.com/solsw/errorhelper"
"github.com/solsw/generichelper"
)
// [SequenceEqual] determines whether two sequences are equal by comparing the elements using [generichelper.DeepEqual].
//
// [SequenceEqual]: https://learn.microsoft.com/dotnet/api/system.linq.enumerable.sequenceequal
func SequenceEqual[Source any](first, second iter.Seq[Source]) (bool, error) {
if first == nil || second == nil {
return false, errorhelper.CallerError(ErrNilSource)
}
r, err := SequenceEqualEq(first, second, generichelper.DeepEqual[Source])
if err != nil {
return false, errorhelper.CallerError(err)
}
return r, nil
}
// [SequenceEqualEq] determines whether two sequences are equal by comparing their elements using a specified 'equal'.
//
// [SequenceEqualEq]: https://learn.microsoft.com/dotnet/api/system.linq.enumerable.sequenceequal
func SequenceEqualEq[Source any](first, second iter.Seq[Source], equal func(Source, Source) bool) (bool, error) {
if first == nil || second == nil {
return false, errorhelper.CallerError(ErrNilSource)
}
if equal == nil {
return false, errorhelper.CallerError(ErrNilEqual)
}
next1, stop1 := iter.Pull(first)
defer stop1()
next2, stop2 := iter.Pull(second)
defer stop2()
for {
s1, ok1 := next1()
s2, ok2 := next2()
if ok1 != ok2 {
return false, nil
}
// here ok1 and ok2 are either both true or both false
if !ok1 {
break
}
if !equal(s1, s2) {
return false, nil
}
}
return true, nil
}
// SequenceEqual2 determines whether two sequences are equal by comparing the elements using [generichelper.DeepEqual].
func SequenceEqual2[K, V any](first, second iter.Seq2[K, V]) (bool, error) {
if first == nil || second == nil {
return false, errorhelper.CallerError(ErrNilSource)
}
r, err := SequenceEqual2Eq(first, second, generichelper.DeepEqual[K], generichelper.DeepEqual[V])
if err != nil {
return false, errorhelper.CallerError(err)
}
return r, nil
}
// SequenceEqual2Eq determines whether two sequences are equal by comparing their elements using specified equals.
func SequenceEqual2Eq[K, V any](first, second iter.Seq2[K, V], equalK func(K, K) bool, equalV func(V, V) bool) (bool, error) {
if first == nil || second == nil {
return false, errorhelper.CallerError(ErrNilSource)
}
if equalK == nil || equalV == nil {
return false, errorhelper.CallerError(ErrNilEqual)
}
next1, stop1 := iter.Pull2(first)
defer stop1()
next2, stop2 := iter.Pull2(second)
defer stop2()
for {
k1, v1, ok1 := next1()
k2, v2, ok2 := next2()
if ok1 != ok2 {
return false, nil
}
// here ok1 and ok2 are either both true or both false
if !ok1 {
break
}
if !(equalK(k1, k2) && equalV(v1, v2)) {
return false, nil
}
}
return true, nil
}