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map.go
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map.go
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package lang
func SafeMerge(m1, m2 IPersistentMap) IPersistentMap {
if m1 == nil {
return m2
}
if m2 == nil {
return m1
}
return Merge(m1, m2)
}
func Merge(m1, m2 IPersistentMap) IPersistentMap {
// TODO: use transient
var res Associative = m1
for seq := Seq(m2); seq != nil; seq = seq.Next() {
entry := seq.First().(IMapEntry)
res = res.Assoc(entry.Key(), entry.Val())
}
return res.(IPersistentMap)
}
func mapEquals(m IPersistentMap, v2 interface{}) bool {
if m == v2 {
return true
}
if c, ok := v2.(Counted); ok {
if m.Count() != c.Count() {
return false
}
}
assoc, ok := v2.(Associative)
if !ok {
return false
}
for seq := m.Seq(); seq != nil; seq = seq.Next() {
entry := seq.First().(IMapEntry)
if !assoc.ContainsKey(entry.Key()) {
return false
}
if !Equals(entry.Val(), assoc.EntryAt(entry.Key()).Val()) {
return false
}
}
return true
}
func equalKey(k1, k2 interface{}) bool {
if k1, ok := k1.(Keyword); ok {
return k1 == k2
}
return Equals(k1, k2)
}