Removes and returns the first value

# Ds\Sequence::shift

(PECL ds >= 1.0.0)

Ds\Sequence::shift — Removes and returns the first value

### Descrierea

abstract public Ds\Sequence::shift ( void ) : mixed

Removes and returns the first value.

### Parametri

Această funcție nu are parametri.

### Valorile întoarse

The first value, which was removed.

### Erori/Excepții

UnderflowException if empty.

### Exemple

Example #1 Ds\Sequence::shift() example

`<?php
$sequence = new \Ds\Vector(["a", "b", "c"]);
var_dump($sequence->shift());
var_dump($sequence->shift());
var_dump($sequence->shift());
?>`

Exemplul de mai sus va afișa ceva similar cu:

    string(1) "a"
    string(1) "b"
    string(1) "c"