docs: comment

pkg/ds/dic/concurrent_map.go

@@ -4,17 +4,20 @@ import (
  "sync"
 )
 
+// ConcurrentDictionary is a thread-safe dictionary.
 type ConcurrentDictionary[K comparable, V any] struct {
  m *Dictionary[K, V]
  l sync.RWMutex
 }
 
+// NewConcurrentDictionary creates a new ConcurrentDictionary.
 func NewConcurrentDictionary[K comparable, V any]() *ConcurrentDictionary[K, V] {
  return &ConcurrentDictionary[K, V]{
  m: NewDictionary[K, V](),
  }
 }
 
+// Add adds a new item to the dictionary.
 func (d *ConcurrentDictionary[K, V]) Add(key K, value V) bool {
  d.l.Lock()
  defer d.l.Unlock()