The Map class
(Информация о версии неизвестна, возможно, только в SVN)
Введение
A Map is a sequential collection of key-value pairs, almost identical to an array used in a similar context. Keys can be any type, but must be unique. Values are replaced if added to the map using the same key.
Strengths
- Keys and values can be any type, including objects.
- Supports array syntax (square brackets).
- Insertion order is preserved.
- Performance and memory efficiency is very similar to an array.
- Automatically frees allocated memory when its size drops low enough.
Weaknesses
- Can’t be converted to an array when objects are used as keys.
Обзор классов
Ds\Map
implements
Ds\Collection
{
/* Constants */
/* Методы */
}Предопределенные константы
Ds\Map::MIN_CAPACITY
Содержание
- Ds\Map::allocate — Allocates enough memory for a required capacity.
- Ds\Map::apply — Updates all values by applying a callback function to each value.
- Ds\Map::capacity — Returns the current capacity.
- Ds\Map::clear — Removes all values.
- Ds\Map::__construct — Creates a new instance.
- Ds\Map::copy — Returns a shallow copy of the map.
- Ds\Map::count — Returns the number of values in the map.
- Ds\Map::diff — Creates a new map using keys that aren't in another map.
- Ds\Map::filter — Creates a new map using a callable to determine which pairs to include.
- Ds\Map::first — Returns the first pair in the map.
- Ds\Map::get — Returns the value for a given key.
- Ds\Map::hasKey — Determines whether the map contains a given key.
- Ds\Map::hasValue — Determines whether the map contains a given value.
- Ds\Map::intersect — Creates a new map by intersecting keys with another map.
- Ds\Map::isEmpty — Returns whether the map is empty
- Ds\Map::jsonSerialize — Returns a representation that can be converted to JSON.
- Ds\Map::keys — Returns a set of the map's keys.
- Ds\Map::ksort — Sorts the map in-place by key.
- Ds\Map::ksorted — Returns a copy, sorted by key.
- Ds\Map::last — Returns the last pair of the map.
- Ds\Map::map — Returns the result of applying a callback to each value.
- Ds\Map::merge — Returns the result of adding all given associations.
- Ds\Map::pairs — Returns a sequence containing all the pairs of the map.
- Ds\Map::put — Associates a key with a value.
- Ds\Map::putAll — Associates all key-value pairs of a traversable object or array.
- Ds\Map::reduce — Reduces the map to a single value using a callback function.
- Ds\Map::remove — Removes and returns a value by key.
- Ds\Map::reverse — Reverses the map in-place.
- Ds\Map::reversed — Returns a reversed copy.
- Ds\Map::skip — Returns the pair at a given positional index.
- Ds\Map::slice — Returns a subset of the map defined by a starting index and length.
- Ds\Map::sort — Sorts the map in-place by value.
- Ds\Map::sorted — Returns a copy, sorted by value.
- Ds\Map::sum — Returns the sum of all values in the map.
- Ds\Map::toArray — Converts the map to an array.
- Ds\Map::union — Creates a new map using values from the current instance and another map.
- Ds\Map::values — Returns a sequence of the map's values.
- Ds\Map::xor — Creates a new map using keys of either the current instance or of another map, but not of both.
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