Ds\Vector::first

(PECL ds >= 1.0.0)

Ds\Vector::first — Returns the first value in the vector

public Ds\Vector::first ( void ) : mixed

Returns the first value in the vector.

此函数没有参数。

The first value in the vector.

Example #1 Ds\Vector::first() example


<?php
$vector = new \Ds\Vector([1, 2, 3]);
var_dump($vector->first());
?>

以上例程的输出类似于：

int(1)

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