Documentation
¶
Overview ¶
Package treemap implements a map backed by red-black tree.
Elements are ordered by key in the map.
Structure is not thread safe.
Index ¶
- type Iterator
- func (iterator *Iterator) Begin()
- func (iterator *Iterator) End()
- func (iterator *Iterator) First() bool
- func (iterator *Iterator) Key() interface{}
- func (iterator *Iterator) Last() bool
- func (iterator *Iterator) Next() bool
- func (iterator *Iterator) Prev() bool
- func (iterator *Iterator) Value() interface{}
- type Map
- func (m *Map) All(f func(key interface{}, value interface{}) bool) bool
- func (m *Map) Any(f func(key interface{}, value interface{}) bool) bool
- func (m *Map) Ceiling(key interface{}) (foundKey interface{}, foundValue interface{})
- func (m *Map) Clear()
- func (m *Map) Each(f func(key interface{}, value interface{}))
- func (m *Map) Empty() bool
- func (m *Map) Find(f func(key interface{}, value interface{}) bool) (interface{}, interface{})
- func (m *Map) Floor(key interface{}) (foundKey interface{}, foundValue interface{})
- func (m *Map) FromJSON(data []byte) error
- func (m *Map) Get(key interface{}) (value interface{}, found bool)
- func (m *Map) Iterator() Iterator
- func (m *Map) Keys() []interface{}
- func (m *Map) Map(f func(key1 interface{}, value1 interface{}) (interface{}, interface{})) *Map
- func (m *Map) Max() (key interface{}, value interface{})
- func (m *Map) Min() (key interface{}, value interface{})
- func (m *Map) Put(key interface{}, value interface{})
- func (m *Map) Remove(key interface{})
- func (m *Map) Select(f func(key interface{}, value interface{}) bool) *Map
- func (m *Map) Size() int
- func (m *Map) String() string
- func (m *Map) ToJSON() ([]byte, error)
- func (m *Map) Values() []interface{}
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Iterator ¶
type Iterator struct {
// contains filtered or unexported fields
}
Iterator holding the iterator's state
func (*Iterator) Begin ¶
func (iterator *Iterator) Begin()
Begin resets the iterator to its initial state (one-before-first) Call Next() to fetch the first element if any.
func (*Iterator) End ¶
func (iterator *Iterator) End()
End moves the iterator past the last element (one-past-the-end). Call Prev() to fetch the last element if any.
func (*Iterator) First ¶
First moves the iterator to the first element and returns true if there was a first element in the container. If First() returns true, then first element's key and value can be retrieved by Key() and Value(). Modifies the state of the iterator
func (*Iterator) Key ¶
func (iterator *Iterator) Key() interface{}
Key returns the current element's key. Does not modify the state of the iterator.
func (*Iterator) Last ¶
Last moves the iterator to the last element and returns true if there was a last element in the container. If Last() returns true, then last element's key and value can be retrieved by Key() and Value(). Modifies the state of the iterator.
func (*Iterator) Next ¶
Next moves the iterator to the next element and returns true if there was a next element in the container. If Next() returns true, then next element's key and value can be retrieved by Key() and Value(). If Next() was called for the first time, then it will point the iterator to the first element if it exists. Modifies the state of the iterator.
type Map ¶
type Map struct {
// contains filtered or unexported fields
}
Map holds the elements in a red-black tree
func NewWith ¶
func NewWith(comparator util.Comparator) *Map
NewWith instantiates a tree map with the custom comparator.
func NewWithIntComparator ¶
func NewWithIntComparator() *Map
NewWithIntComparator instantiates a tree map with the IntComparator, i.e. keys are of type int.
func NewWithStringComparator ¶
func NewWithStringComparator() *Map
NewWithStringComparator instantiates a tree map with the StringComparator, i.e. keys are of type string.
func (*Map) All ¶
All passes each element of the container to the given function and returns true if the function returns true for all elements.
func (*Map) Any ¶
Any passes each element of the container to the given function and returns true if the function ever returns true for any element.
func (*Map) Ceiling ¶
func (m *Map) Ceiling(key interface{}) (foundKey interface{}, foundValue interface{})
Ceiling finds the ceiling key-value pair for the input key. In case that no ceiling is found, then both returned values will be nil. It's generally enough to check the first value (key) for nil, which determines if ceiling was found.
Ceiling key is defined as the smallest key that is larger than or equal to the given key. A ceiling key may not be found, either because the map is empty, or because all keys in the map are smaller than the given key.
Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Map) Each ¶
func (m *Map) Each(f func(key interface{}, value interface{}))
Each calls the given function once for each element, passing that element's key and value.
func (*Map) Find ¶
Find passes each element of the container to the given function and returns the first (key,value) for which the function is true or nil,nil otherwise if no element matches the criteria.
func (*Map) Floor ¶
func (m *Map) Floor(key interface{}) (foundKey interface{}, foundValue interface{})
Floor finds the floor key-value pair for the input key. In case that no floor is found, then both returned values will be nil. It's generally enough to check the first value (key) for nil, which determines if floor was found.
Floor key is defined as the largest key that is smaller than or equal to the given key. A floor key may not be found, either because the map is empty, or because all keys in the map are larger than the given key.
Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Map) Get ¶
Get searches the element in the map by key and returns its value or nil if key is not found in tree. Second return parameter is true if key was found, otherwise false. Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Map) Map ¶
Map invokes the given function once for each element and returns a container containing the values returned by the given function as key/value pairs.
func (*Map) Max ¶
func (m *Map) Max() (key interface{}, value interface{})
Max returns the maximum key and its value from the tree map. Returns nil, nil if map is empty.
func (*Map) Min ¶
func (m *Map) Min() (key interface{}, value interface{})
Min returns the minimum key and its value from the tree map. Returns nil, nil if map is empty.
func (*Map) Put ¶
func (m *Map) Put(key interface{}, value interface{})
Put inserts key-value pair into the map. Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Map) Remove ¶
func (m *Map) Remove(key interface{})
Remove removes the element from the map by key. Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Map) Select ¶
Select returns a new container containing all elements for which the given function returns a true value.
Source Files