Ds\Deque::sum
(PECL ds >= 1.0.0)
Ds\Deque::sum — Returns the sum of all values in the deque
說明
public Ds\Deque::sum(): int|float
Returns the sum of all values in the deque.
注意:
Arrays and objects are considered equal to zero when calculating the sum.
參數
此函式沒有參數。
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.
範例
示例 #1 Ds\Deque::sum() integer example
<?php
$deque = new \Ds\Deque([1, 2, 3]);
var_dump($deque->sum());
?>
以上例程的輸出類似於：
int(6)
示例 #2 Ds\Deque::sum() float example
<?php
$deque = new \Ds\Deque([1, 2.5, 3]);
var_dump($deque->sum());
?>
以上例程的輸出類似於：
float(6.5)