PHP 7.1.21 Released

Ds\Set::sum

(PECL ds >= 1.0.0)

Ds\Set::sumReturns the sum of all values in the set

说明

public number Ds\Set::sum ( void )

Returns the sum of all values in the set.

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 set as either a float or int depending on the values in the set.

范例

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

<?php
$set 
= new \Ds\Set([123]);
var_dump($set->sum());
?>

以上例程的输出类似于:

int(6)

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

<?php
$set 
= new \Ds\Set([12.53]);
var_dump($set->sum());
?>

以上例程的输出类似于:

float(6.5)
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