1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
# frozen_string_literal: true
module TTFunk
# Sum aggreaget. Is sums all pushed values.
class Sum < Aggregate
# Value
#
# @return [#+]
attr_reader :value
# @param init_value [#+] initial value
def initialize(init_value = 0)
super()
@value = init_value
end
# Push a value. It will be added to the current value.
#
# @param operand [any]
# @return [void]
def <<(operand)
@value += coerce(operand)
end
# Get the stored value or default.
#
# @param _default [any] Unused. Here for API compatibility.
# @return [any]
def value_or(_default)
# value should always be non-nil
value
end
end
end
|
