array_sum

  • We can get the sum of an array of integers using a combination of Ruby’s Enumerable#inject method with Fixnum#+.

    PHP

    $numbers = array(1, 2, 3);
$result = array_sum($numbers);
print $result."\n";
// => 6

    Ruby

    result = [2, 2, 2, 2].inject {|sum, element| sum + element }
puts result
# => 6

    The ActiveSupport library that comes with Rails includes an Enumerable#sum method to simplify this operation.

    Rails

    [1, 2, 3].sum

    see also

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