Ds\Vector::isEmpty

(PECL ds >= 1.0.0)

Ds\Vector::isEmpty — Returns whether the vector is empty

public Ds\Vector::isEmpty(): bool

Returns whether the vector is empty.

此函数没有参数。

Returns true if the vector is empty, false otherwise.

示例 #1 Ds\Vector::isEmpty() example

<?php
$a = new \Ds\Vector([1, 2, 3]);
$b = new \Ds\Vector();

var_dump($a->isEmpty());
var_dump($b->isEmpty());
?>

以上示例的输出类似于：

bool(false)
bool(true)

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