Ds\Deque::sum

(PECL ds >= 1.0.0)

Ds\Deque::sum — Returns the sum of all values in the deque

说明

public Ds\Deque::sum ( void ) : number

Returns the sum of all values in the deque.

Note:

Arrays and objects are considered equal to zero when calculating the sum.

参数

此函数没有参数。

返回值

The sum of all the values in the deque as either a float or int depending on the values in the deque.

范例

Example #1 Ds\Deque::sum() integer example

<?php
$deque = new \Ds\Deque([1, 2, 3]);
var_dump($deque->sum());
?>

以上例程的输出类似于：

int(6)

Example #2 Ds\Deque::sum() float example

<?php
$deque = new \Ds\Deque([1, 2.5, 3]);
var_dump($deque->sum());
?>

以上例程的输出类似于：

float(6.5)