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PHP - Vector Functions
The Vector is a sequence of values in a contiguous buffer that grows and shrinks automatically. It is the most efficient sequential structure because the value index is a direct mapping to its index in a buffer, and the growth factor is not bound to 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).
Class synopsis
Ds\Vector implements Ds\Sequence { /* Constants */ const int MIN_CAPACITY = 10 ; /* Methods */ public void allocate( int $capacity ) public void apply( callable $callback ) public int capacity( void ) public void clear( void ) public bool contains([ mixed $...values ] ) public Ds\Vector copy( void ) public Ds\Vector filter([ callable $callback ] ) public mixed find( mixed $value ) public mixed first( void ) public mixed get( int $index ) public void insert( int $index [, mixed $...values ] ) public bool isEmpty( void ) public string join([ string $glue ] ) public mixed last( void ) public Ds\Vector map( callable $callback ) public Ds\Vector merge( mixed $values ) public mixed pop( void ) public void push([ mixed $...values ] ) public mixed reduce( callable $callback [, mixed $initial ] ) public mixed remove( int $index ) public void reverse( void ) public Ds\Vector reversed( void ) public void rotate( int $rotations ) public void set( int $index , mixed $value ) public mixed shift( void ) public Ds\Vector slice( int $index [, int $length ] ) public void sort([ callable $comparator ] ) public Ds\Vector sorted([ callable $comparator ] ) public number sum( void ) public array toArray( void ) public void unshift([ mixed $values ] ) }
Predefined Constants
Ds\Vector::MIN_CAPACITY
Sr.No | Function & Description |
---|---|
1 |
This Function can allocate enough memory for the required capacity. |
2 |
This Function can update all values by applying a callback function to each value. |
3 |
This Function can return the current capacity. |
4 |
This Function can remove all values. |
5 |
This Function can create a new instance. |
6 |
This Function can can determine if a vector contain given values. |
7 |
This Function can return a shallow copy of vector. |
8 |
This Function can be used to count the number of elements in a vector. |
9 |
This Function can create a new vector using callable to determine which values to include. |
10 |
This Function can return the first value in a vector. |
11 |
This Function can return a value at given index. |
12 |
This Function can insert the values at a given index. |
13 |
This Function can return whether the vector is empty. |
14 |
This Function can join all values together as a string. |
15 |
This Function can return a representation that can be converted to JSON. |
16 |
This Function can return a last value |
17 |
This Function can return the result of applying a callback to each value. |
18 |
This Function can return the result of adding all given values to a sequence. |
19 |
This Function can remove and return the last value. |
20 |
This Function can add values to end of a vector. |
21 |
This Function can reduce the vector to a single value using callback function. |
22 |
This Function can remove and return a value by index. |
23 |
This Function can reverse the vector in-place. |
24 |
This Function can return a reversed copy. |
25 |
This Function can can rotate the verctor by a given number of rotations. |
26 |
This Function can update the value at a given index. |
27 |
This Function can remove and return the first value |
28 |
This Function can return a sub-vector of the given range. |
29 |
This Function can sort the vector in-place. |
30 |
This Function can return a sorted copy. |
31 |
This Function can return the sum of all values in a vector. |
32 |
This Function can convert the vector to an array. |
33 |
This Function can add values to the front of a vector. |