Vector
PHP Manual

Ds\Vector::slice

(PECL ds >= 1.0.0)

Ds\Vector::slice — Returns a sub-vector of a given range.

Описание

public Ds\Vector Ds\Vector::slice ( int $index [, array $length ] )

Creates a sub-vector of a given range.

Список параметров

index

The index at which the sub-vector starts.

If positive, the vector will start at that index in the vector. If negative, the vector will start that far from the end.

length

If a length is given and is positive, the resulting vector will have up to that many values in it. If the length results in an overflow, only values up to the end of the vector will be included. If a length is given and is negative, the vector will stop that many values from the end. If a length is not provided, the resulting vector will contain all values between the index and the end of the vector.

Возвращаемые значения

A sub-vector of the given range.

Примеры

Пример #1 Ds\Vector::slice() example

<?php
$vector = new \Ds\Vector(["a", "b", "c", "d", "e"]);

// Slice from 2 onwards
print_r($vector->slice(2));

// Slice from 1, for a length of 3
print_r($vector->slice(1, 3));

// Slice from 1 onwards
print_r($vector->slice(1));

// Slice from 2 from the end onwards
print_r($vector->slice(-2));

// Slice from 1 to 1 from the end
print_r($vector->slice(1, -1));
?>

Результатом выполнения данного примера будет что-то подобное:

Ds\Vector Object
(
    [0] => c
    [1] => d
    [2] => e
)
Ds\Vector Object
(
    [0] => b
    [1] => c
    [2] => d
)
Ds\Vector Object
(
    [0] => b
    [1] => c
    [2] => d
    [3] => e
)
Ds\Vector Object
(
    [0] => d
    [1] => e
)
Ds\Vector Object
(
    [0] => b
    [1] => c
    [2] => d
)

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