Ds\Sequence::sum

(PECL ds >= 1.0.0)

Ds\Sequence::sum — Returns the sum of all values in the sequence

abstract public Ds\Sequence::sum(): int|float

Returns the sum of all values in the sequence.

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

此函数没有参数。

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

示例 #1 Ds\Sequence::sum() integer example


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

以上例程的输出类似于：

int(6)

示例 #2 Ds\Sequence::sum() float example


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

以上例程的输出类似于：

float(6.5)

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