The Vector class
(Информация о версии неизвестна, возможно, только в SVN)
Введение
A Vector is a sequence of values in a contiguous buffer that grows and shrinks automatically. It’s the most efficient sequential structure because a value’s index is a direct mapping to its index in the buffer, and the growth factor isn't bound to a specific multiple or exponent.
Strengths
- Supports array syntax (square brackets).
- Uses less overall memory than an array for the same number of values.
- Automatically frees allocated memory when its size drops low enough.
- Capacity does not have to be a power of 2.
- get(), set(), push(), pop() are all O(1).
Weaknesses
- shift(), unshift(), insert() and remove() are all O(n).
Обзор классов
Ds\Vector
implements Ds\Sequence
{
/* Constants */
/* Методы */
}Предопределенные константы
Ds\Vector::MIN_CAPACITY
Содержание
- Ds\Vector::allocate — Allocates enough memory for a required capacity.
- Ds\Vector::apply — Updates all values by applying a callback function to each value.
- Ds\Vector::capacity — Returns the current capacity.
- Ds\Vector::clear — Removes all values.
- Ds\Vector::__construct — Creates a new instance.
- Ds\Vector::contains — Determines if the vector contains given values.
- Ds\Vector::copy — Returns a shallow copy of the vector.
- Ds\Vector::count — Returns the number of values in the collection.
- Ds\Vector::filter — Creates a new vector using a callable to determine which values to include.
- Ds\Vector::find — Attempts to find a value's index.
- Ds\Vector::first — Returns the first value in the vector.
- Ds\Vector::get — Returns the value at a given index.
- Ds\Vector::insert — Inserts values at a given index.
- Ds\Vector::isEmpty — Returns whether the vector is empty
- Ds\Vector::join — Joins all values together as a string.
- Ds\Vector::jsonSerialize — Returns a representation that can be converted to JSON.
- Ds\Vector::last — Returns the last value.
- Ds\Vector::map — Returns the result of applying a callback to each value.
- Ds\Vector::merge — Returns the result of adding all given values to the vector.
- Ds\Vector::pop — Removes and returns the last value.
- Ds\Vector::push — Adds values to the end of the vector.
- Ds\Vector::reduce — Reduces the vector to a single value using a callback function.
- Ds\Vector::remove — Removes and returns a value by index.
- Ds\Vector::reverse — Reverses the vector in-place.
- Ds\Vector::reversed — Returns a reversed copy.
- Ds\Vector::rotate — Rotates the vector by a given number of rotations.
- Ds\Vector::set — Updates a value at a given index.
- Ds\Vector::shift — Removes and returns the first value.
- Ds\Vector::slice — Returns a sub-vector of a given range.
- Ds\Vector::sort — Sorts the vector in-place.
- Ds\Vector::sorted — Returns a sorted copy.
- Ds\Vector::sum — Returns the sum of all values in the vector.
- Ds\Vector::toArray — Converts the vector to an array.
- Ds\Vector::unshift — Adds values to the front of the vector.
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