linkedhashmap

package
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Published: Jul 20, 2022 License: BSD-2-Clause, ISC Imports: 8 Imported by: 0

Documentation

Overview

Package linkedhashmap is a map that preserves insertion-order.

It is backed by a hash table to store values and doubly-linked list to store ordering.

Structure is not thread safe.

Reference: http://en.wikipedia.org/wiki/Associative_array

Index

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

func (iterator *Iterator) First() bool

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

func (iterator *Iterator) Last() bool

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

func (iterator *Iterator) Next() bool

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.

func (*Iterator) NextTo

func (iterator *Iterator) NextTo(f func(key interface{}, value interface{}) bool) bool

NextTo moves the iterator to the next element from current position that satisfies the condition given by the passed function, and returns true if there was a next element in the container. If NextTo() returns true, then next element's key and value can be retrieved by Key() and Value(). Modifies the state of the iterator.

func (*Iterator) Prev

func (iterator *Iterator) Prev() bool

Prev moves the iterator to the previous element and returns true if there was a previous element in the container. If Prev() returns true, then previous element's key and value can be retrieved by Key() and Value(). Modifies the state of the iterator.

func (*Iterator) PrevTo

func (iterator *Iterator) PrevTo(f func(key interface{}, value interface{}) bool) bool

PrevTo moves the iterator to the previous element from current position that satisfies the condition given by the passed function, and returns true if there was a next element in the container. If PrevTo() returns true, then next element's key and value can be retrieved by Key() and Value(). Modifies the state of the iterator.

func (*Iterator) Value

func (iterator *Iterator) Value() interface{}

Value returns the current element's value. Does not modify the state of the iterator.

type Map

type Map[TKey comparable, TValue any] struct {
	// contains filtered or unexported fields
}

Map holds the elements in a regular hash table, and uses doubly-linked list to store key ordering.

func New

func New[TKey comparable, TValue any]() *Map[TKey, TValue]

New instantiates a linked-hash-map.

func (*Map[TKey, TValue]) Clear

func (m *Map[TKey, TValue]) Clear()

Clear removes all elements from the map.

func (*Map[TKey, TValue]) FromJSON

func (m *Map[TKey, TValue]) FromJSON(data []byte) error

FromJSON populates map from the input JSON representation.

func (*Map[TKey, TValue]) Get

func (m *Map[TKey, TValue]) Get(key TKey) (value TValue, found bool)

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[TKey, TValue]) GetKeys added in v0.4.0

func (m *Map[TKey, TValue]) GetKeys() []TKey

GetKeys returns all keys in-order

func (*Map[TKey, TValue]) GetValues added in v0.3.0

func (m *Map[TKey, TValue]) GetValues() []TValue

Values returns all values in-order based on the key.

func (*Map[TKey, TValue]) IsEmpty added in v0.3.0

func (m *Map[TKey, TValue]) IsEmpty() bool

Empty returns true if map does not contain any elements

func (*Map) Iterator

func (m *Map) Iterator() Iterator

Iterator returns a stateful iterator whose elements are key/value pairs.

func (*Map[TKey, TValue]) MarshalJSON

func (m *Map[TKey, TValue]) MarshalJSON() ([]byte, error)

MarshalJSON @implements json.Marshaler

func (*Map[TKey, TValue]) MergeWith added in v0.3.0

func (m *Map[TKey, TValue]) MergeWith(other *maps.Map[TKey, TValue]) bool

func (*Map[TKey, TValue]) MergeWithSafe added in v0.3.0

func (m *Map[TKey, TValue]) MergeWithSafe(other *maps.Map[TKey, TValue], overwriteOriginal bool)

func (*Map[TKey, TValue]) Put

func (m *Map[TKey, TValue]) Put(key TKey, value TValue)

Put inserts key-value pair into the map. Key should adhere to the comparator's type assertion, otherwise method panics.

func (*Map[TKey, TValue]) Remove

func (m *Map[TKey, TValue]) Remove(comparator utils.Comparator[TKey], key TKey)

Remove removes the element from the map by key. Key should adhere to the comparator's type assertion, otherwise method panics.

func (*Map[TKey, TValue]) Size

func (m *Map[TKey, TValue]) Size() int

Size returns number of elements in the map.

func (*Map[TKey, TValue]) ToJSON

func (m *Map[TKey, TValue]) ToJSON() ([]byte, error)

ToJSON outputs the JSON representation of map.

func (*Map[TKey, TValue]) ToString added in v0.3.0

func (m *Map[TKey, TValue]) ToString() string

String returns a string representation of container

func (*Map[Tkey, TValue]) UnmarshalJSON

func (m *Map[Tkey, TValue]) UnmarshalJSON(bytes []byte) error

UnmarshalJSON @implements json.Unmarshaler

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