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(PECL ds >= 1.0.0)
Ds\Vector::sum — Returns the sum of all values in the vector
Returns the sum of all values in the vector.
注意:
Arrays and objects are considered equal to zero when calculating the sum.
この関数にはパラメータはありません。
The sum of all the values in the vector as either a float or int depending on the values in the vector.
例1 Ds\Vector::sum() integer example
<?php
$vector = new \Ds\Vector([1, 2, 3]);
var_dump($vector->sum());
?>
上の例の出力は、 たとえば以下のようになります。
int(6)
例2 Ds\Vector::sum() float example
<?php
$vector = new \Ds\Vector([1, 2.5, 3]);
var_dump($vector->sum());
?>
上の例の出力は、 たとえば以下のようになります。
float(6.5)